fix(types): correct nullability of config fields in command TypedDicts

Several command TypedDicts declared fields as non-nullable (int, str,
dict, list) while argparse produces None when CLI flags are omitted.
Runtime code already handles None correctly, but the type annotations
were misleading.

Changes:
- CommitArgs: message_length_limit int -> int | None
- CheckArgs: message_length_limit int -> int | None,
  allowed_prefixes list[str] -> list[str] | None
- BumpArgs: file_name str -> str | None
- ChangelogArgs: file_name, start_rev, tag_format, version_scheme,
  export_template, template str -> str | None;
  extras dict[str, Any] -> dict[str, Any] | None

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: bearomorphism

commitizen/commands/bump.py

@@ -47,7 +47,7 @@ class BumpArgs(Settings, total=False):
     check_consistency: bool
     devrelease: int | None
     dry_run: bool
-    file_name: str
+    file_name: str | None
     files_only: bool | None
     version_files_only: bool | None
     get_next: bool  # TODO: maybe rename to `next_version_to_stdout`

commitizen/commands/changelog.py

@@ -31,17 +31,17 @@ class ChangelogArgs(TypedDict, total=False):
     change_type_order: list[str]
     current_version: str
     dry_run: bool
-    file_name: str
+    file_name: str | None
     incremental: bool
     merge_prerelease: bool
     rev_range: str
-    start_rev: str
-    tag_format: str
+    start_rev: str | None
+    tag_format: str | None
     unreleased_version: str | None
-    version_scheme: str
-    template: str
-    extras: dict[str, Any]
-    export_template: str
+    version_scheme: str | None
+    template: str | None
+    extras: dict[str, Any] | None
+    export_template: str | None
     during_version_bump: bool | None
     allow_no_commit: bool | None  # Internal-only when invoked by bump.
 

commitizen/commands/check.py

@@ -21,8 +21,8 @@ class CheckArgs(TypedDict, total=False):
     commit_msg: str
     rev_range: str
     allow_abort: bool
-    message_length_limit: int
-    allowed_prefixes: list[str]
+    message_length_limit: int | None
+    allowed_prefixes: list[str] | None
     message: str
     use_default_range: bool
 

commitizen/commands/commit.py

@@ -35,7 +35,7 @@ class CommitArgs(TypedDict, total=False):
     dry_run: bool
     edit: bool
     extra_cli_args: list[str]
-    message_length_limit: int
+    message_length_limit: int | None
     no_retry: bool
     signoff: bool
     write_message_to_file: Path | None