Add production-grade OSS infrastructure

.editorconfig

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+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# All files
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 4
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+# Code files
+[*.{cs,csx,vb,vbx}]
+indent_size = 4
+insert_final_newline = true
+
+# XML project files
+[*.{csproj,vbproj,vcxproj,vcxproj.filters,proj,projitems,shproj}]
+indent_size = 2
+
+# XML config files
+[*.{props,targets,ruleset,config,nuspec,resx,vsixmanifest,vsct}]
+indent_size = 2
+
+# JSON files
+[*.json]
+indent_size = 2
+
+# YAML files
+[*.{yml,yaml}]
+indent_size = 2
+
+# Shell scripts
+[*.sh]
+end_of_line = lf
+
+# Markdown files
+[*.md]
+trim_trailing_whitespace = false
+
+# C# files
+[*.cs]
+
+# New line preferences
+csharp_new_line_before_open_brace = all
+csharp_new_line_before_else = true
+csharp_new_line_before_catch = true
+csharp_new_line_before_finally = true
+csharp_new_line_before_members_in_object_initializers = true
+csharp_new_line_before_members_in_anonymous_types = true
+csharp_new_line_between_query_expression_clauses = true
+
+# Indentation preferences
+csharp_indent_case_contents = true
+csharp_indent_switch_labels = true
+csharp_indent_labels = no_change
+csharp_indent_block_contents = true
+csharp_indent_braces = false
+csharp_indent_case_contents_when_block = false
+
+# Space preferences
+csharp_space_after_cast = false
+csharp_space_after_keywords_in_control_flow_statements = true
+csharp_space_between_method_call_parameter_list_parentheses = false
+csharp_space_between_method_declaration_parameter_list_parentheses = false
+csharp_space_between_parentheses = false
+csharp_space_before_colon_in_inheritance_clause = true
+csharp_space_after_colon_in_inheritance_clause = true
+csharp_space_around_binary_operators = before_and_after
+csharp_space_between_method_declaration_empty_parameter_list_parentheses = false
+csharp_space_between_method_call_name_and_opening_parenthesis = false
+csharp_space_between_method_call_empty_parameter_list_parentheses = false
+
+# Wrapping preferences
+csharp_preserve_single_line_statements = false
+csharp_preserve_single_line_blocks = true
+
+# Code style preferences
+csharp_prefer_braces = true:warning
+csharp_prefer_simple_using_statement = true:suggestion
+
+# Pattern matching preferences
+csharp_style_pattern_matching_over_is_with_cast_check = true:suggestion
+csharp_style_pattern_matching_over_as_with_null_check = true:suggestion
+
+# Null checking preferences
+csharp_style_throw_expression = true:suggestion
+csharp_style_conditional_delegate_call = true:suggestion
+
+# Modifier preferences
+csharp_prefer_static_local_function = true:suggestion
+csharp_preferred_modifier_order = public,private,protected,internal,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,volatile,async:suggestion
+
+# Expression preferences
+csharp_prefer_simple_default_expression = true:suggestion
+csharp_style_pattern_local_over_anonymous_function = true:suggestion
+csharp_style_inlined_variable_declaration = true:suggestion
+
+# Expression-bodied members
+csharp_style_expression_bodied_methods = false:none
+csharp_style_expression_bodied_constructors = false:none
+csharp_style_expression_bodied_operators = false:none
+csharp_style_expression_bodied_properties = true:suggestion
+csharp_style_expression_bodied_indexers = true:suggestion
+csharp_style_expression_bodied_accessors = true:suggestion
+csharp_style_expression_bodied_lambdas = true:suggestion
+csharp_style_expression_bodied_local_functions = false:none
+
+# Variable preferences
+csharp_style_var_for_built_in_types = false:warning
+csharp_style_var_when_type_is_apparent = false:warning
+csharp_style_var_elsewhere = false:warning
+
+# Naming conventions
+dotnet_naming_rule.interfaces_should_be_prefixed_with_i.severity = warning
+dotnet_naming_rule.interfaces_should_be_prefixed_with_i.symbols = interface
+dotnet_naming_rule.interfaces_should_be_prefixed_with_i.style = begins_with_i
+
+dotnet_naming_rule.types_should_be_pascal_case.severity = warning
+dotnet_naming_rule.types_should_be_pascal_case.symbols = types
+dotnet_naming_rule.types_should_be_pascal_case.style = pascal_case
+
+dotnet_naming_rule.non_field_members_should_be_pascal_case.severity = warning
+dotnet_naming_rule.non_field_members_should_be_pascal_case.symbols = non_field_members
+dotnet_naming_rule.non_field_members_should_be_pascal_case.style = pascal_case
+
+dotnet_naming_rule.private_fields_should_be_prefixed_with_underscore.severity = warning
+dotnet_naming_rule.private_fields_should_be_prefixed_with_underscore.symbols = private_fields
+dotnet_naming_rule.private_fields_should_be_prefixed_with_underscore.style = begins_with_underscore
+
+# Symbol specifications
+dotnet_naming_symbols.interface.applicable_kinds = interface
+dotnet_naming_symbols.interface.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.interface.required_modifiers = 
+
+dotnet_naming_symbols.types.applicable_kinds = class, struct, interface, enum
+dotnet_naming_symbols.types.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.types.required_modifiers = 
+
+dotnet_naming_symbols.non_field_members.applicable_kinds = property, event, method
+dotnet_naming_symbols.non_field_members.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.non_field_members.required_modifiers = 
+
+dotnet_naming_symbols.private_fields.applicable_kinds = field
+dotnet_naming_symbols.private_fields.applicable_accessibilities = private
+dotnet_naming_symbols.private_fields.required_modifiers = 
+
+# Naming styles
+dotnet_naming_style.pascal_case.required_prefix = 
+dotnet_naming_style.pascal_case.required_suffix = 
+dotnet_naming_style.pascal_case.word_separator = 
+dotnet_naming_style.pascal_case.capitalization = pascal_case
+
+dotnet_naming_style.begins_with_i.required_prefix = I
+dotnet_naming_style.begins_with_i.required_suffix = 
+dotnet_naming_style.begins_with_i.word_separator = 
+dotnet_naming_style.begins_with_i.capitalization = pascal_case
+
+dotnet_naming_style.begins_with_underscore.required_prefix = _
+dotnet_naming_style.begins_with_underscore.required_suffix = 
+dotnet_naming_style.begins_with_underscore.word_separator = 
+dotnet_naming_style.begins_with_underscore.capitalization = camel_case
+
+# .NET code quality
+dotnet_code_quality_unused_parameters = all:suggestion
+
+# .NET style
+dotnet_sort_system_directives_first = true
+dotnet_separate_import_directive_groups = false
+
+# Organize usings
+dotnet_sort_system_directives_first = true
+
+# this. preferences
+dotnet_style_qualification_for_field = false:warning
+dotnet_style_qualification_for_property = false:warning
+dotnet_style_qualification_for_method = false:warning
+dotnet_style_qualification_for_event = false:warning
+
+# Language keywords vs BCL types preferences
+dotnet_style_predefined_type_for_locals_parameters_members = true:warning
+dotnet_style_predefined_type_for_member_access = true:warning
+
+# Parentheses preferences
+dotnet_style_parentheses_in_arithmetic_binary_operators = always_for_clarity:silent
+dotnet_style_parentheses_in_relational_binary_operators = always_for_clarity:silent
+dotnet_style_parentheses_in_other_binary_operators = always_for_clarity:silent
+dotnet_style_parentheses_in_other_operators = never_if_unnecessary:silent
+
+# Expression-level preferences
+dotnet_style_object_initializer = true:suggestion
+dotnet_style_collection_initializer = true:suggestion
+dotnet_style_explicit_tuple_names = true:suggestion
+dotnet_style_prefer_inferred_tuple_names = true:suggestion
+dotnet_style_prefer_inferred_anonymous_type_member_names = true:suggestion
+dotnet_style_prefer_auto_properties = true:suggestion
+dotnet_style_prefer_conditional_expression_over_assignment = true:silent
+dotnet_style_prefer_conditional_expression_over_return = true:silent
+dotnet_style_prefer_compound_assignment = true:suggestion
+
+# Null-checking preferences
+dotnet_style_coalesce_expression = true:suggestion
+dotnet_style_null_propagation = true:suggestion
+dotnet_style_prefer_is_null_check_over_reference_equality_method = true:suggestion
+
+# File header preferences
+# file_header_template = unset
+
+# Roslynator
+roslynator_accessibility_modifiers = explicit
+roslynator_enum_has_flag_style = method

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug Report
+description: Report a bug or unexpected behavior
+title: "[Bug]: "
+labels: ["bug"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to report this bug! Please fill out the information below to help us resolve it.
+
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: A clear and concise description of what the bug is.
+      placeholder: Describe the bug...
+    validations:
+      required: true
+
+  - type: textarea
+    id: reproduction
+    attributes:
+      label: Steps to Reproduce
+      description: Steps to reproduce the behavior
+      placeholder: |
+        1. Create a state machine with...
+        2. Fire trigger...
+        3. See error...
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected Behavior
+      description: What you expected to happen
+      placeholder: Describe what you expected...
+    validations:
+      required: true
+
+  - type: textarea
+    id: actual
+    attributes:
+      label: Actual Behavior
+      description: What actually happened
+      placeholder: Describe what actually happened...
+    validations:
+      required: true
+
+  - type: textarea
+    id: code
+    attributes:
+      label: Code Sample
+      description: Please provide a minimal code sample that reproduces the issue
+      render: csharp
+      placeholder: |
+        var machine = StateMachine<MyState, MyTrigger, MyCommand>.Create()
+            .StartWith(MyState.Initial)
+            // ...
+            .Build();
+
+  - type: input
+    id: version
+    attributes:
+      label: Library Version
+      description: Which version of FunctionalStateMachine are you using?
+      placeholder: e.g., 1.1.0
+    validations:
+      required: true
+
+  - type: input
+    id: dotnet-version
+    attributes:
+      label: .NET Version
+      description: Which version of .NET are you using?
+      placeholder: e.g., .NET 9.0
+    validations:
+      required: true
+
+  - type: input
+    id: os
+    attributes:
+      label: Operating System
+      description: Which operating system are you using?
+      placeholder: e.g., Windows 11, macOS 14, Ubuntu 22.04
+
+  - type: textarea
+    id: additional
+    attributes:
+      label: Additional Context
+      description: Any other context about the problem
+      placeholder: Add any other context, screenshots, or information here...

.github/ISSUE_TEMPLATE/documentation.yml

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+name: Documentation Issue
+description: Report a problem with documentation or suggest improvements
+title: "[Docs]: "
+labels: ["documentation"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for helping improve our documentation!
+
+  - type: dropdown
+    id: doc-type
+    attributes:
+      label: Documentation Type
+      description: What type of documentation needs attention?
+      options:
+        - README.md
+        - API Documentation
+        - Feature Guide (docs/)
+        - Code Examples
+        - Sample Applications
+        - CHANGELOG
+        - Other
+    validations:
+      required: true
+
+  - type: input
+    id: location
+    attributes:
+      label: Location
+      description: Where is the documentation issue?
+      placeholder: e.g., docs/Guards-and-Conditional-Flows.md, README.md line 120
+
+  - type: textarea
+    id: problem
+    attributes:
+      label: Issue Description
+      description: What's wrong or unclear with the current documentation?
+      placeholder: The documentation says... but it should say...
+    validations:
+      required: true
+
+  - type: textarea
+    id: suggestion
+    attributes:
+      label: Suggested Improvement
+      description: How should it be improved?
+      placeholder: I suggest changing it to...
+
+  - type: textarea
+    id: additional
+    attributes:
+      label: Additional Context
+      description: Any other relevant information
+      placeholder: This is confusing because...