refactor: convert grails-shell-cli to Groovy

[borinquenkid]

What

Converts the remaining Java sources of grails-shell-cli to Groovy: 97 .java files removed, 97 .groovy files added (117 files changed, 4406 insertions(+), 4528 deletions(-)).

Why

The maintainers asked on #16351 for the Java-to-Groovy migration to land one Gradle project at a time as a stack of PRs, bottom-up in dependency order. #16572 did grails-data-hibernate7; this PR is 7 of 30 in the next stack (base: refactor/java-to-groovy-grails-spring). The end state of every file is taken from the 9.0.x-java-to-groovy branch, which already carries the regression fixes found by CI.

Commits:

• 1d74655 fix: keep the Java-facing API of the converted grails-shell-cli classes
• 60fe7bc refactor: convert grails-shell-cli to Groovy

Changed outside the converted sources

• nothing

Java-facing API sweep

Every deleted .java was compared with its Groovy twin via javap -v -protected (class declaration, public/protected fields, constructors, methods incl. modifiers/throws/generics, interface default methods, nested class modifiers, and the annotations callers see). Result:

• grails-shell-cli: 97 deleted .java, 4 difference(s) found and fixed in this PR (see the fix: commit), 0 left

See also the notes below. Remaining informational entries (widened visibility, e.g. Groovy property accessors): 20.

Verification

• classes and testClasses (plus ast/cli/testFixtures source sets where present) of the converted project(s) and of their direct dependents compile: ['grails-profiles-base']
• No test suites were run locally (the umbrella branch was verified; CI runs them). codeStyle, rat and a whole-repo build -PskipTests are run once on the tip of the stack.

Notes

• Informational sweep entries that are not regressions: Groovy enums gain MIN_VALUE/MAX_VALUE/next()/previous(), property accessors appear for formerly package-private members, nested static classes with implicit constructors become public (they were protected), and generic type parameters that Groovy erases in constructors/methods (descriptors identical).
• Groovy gotchas that applied (see build: migrate remaining Java sources to Groovy #16351): static final without public creates a property; == calls equals(); Closure/SAM coercions; @CompileStatic with nested classes. All CI regression fixes found on the umbrella branch are included in the end state.

🤖 Generated with Claude Code

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[codecov]

Codecov Report

❌ Patch coverage is 24.04692% with 1295 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (refactor/java-to-groovy-grails-spring@587469c). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...cli/compiler/grape/MavenResolverGrapeEngine.groovy	11.3636%	113 Missing and 4 partials ⚠️
...g/grails/cli/command/archive/ArchiveCommand.groovy	0.0000%	90 Missing ⚠️
...groovy/org/grails/cli/command/CommandRunner.groovy	0.0000%	78 Missing ⚠️
.../grails/cli/command/archive/ResourceMatcher.groovy	0.0000%	73 Missing ⚠️
.../GrailsApplicationCompilerAutoConfiguration.groovy	0.0000%	58 Missing ⚠️
...org/grails/cli/compiler/maven/MavenSettings.groovy	38.2979%	54 Missing and 4 partials ⚠️
...piler/DependencyManagementBomTransformation.groovy	5.3571%	53 Missing ⚠️
...vy/org/grails/cli/command/install/Installer.groovy	0.0000%	44 Missing ⚠️
...grails/cli/compiler/dependencies/Dependency.groovy	22.0000%	39 Missing ⚠️
...rg/grails/cli/compiler/DependencyCustomizer.groovy	7.5000%	37 Missing ⚠️
... and 67 more

Additional details and impacted files

@@                            Coverage Diff                             @@
##             refactor/java-to-groovy-grails-spring     #16585   +/-   ##
==========================================================================
  Coverage                                         ?   62.8188%           
  Complexity                                       ?      29005           
==========================================================================
  Files                                            ?       2243           
  Lines                                            ?     110599           
  Branches                                         ?      20232           
==========================================================================
  Hits                                             ?      69477           
  Misses                                           ?      32083           
  Partials                                         ?       9039           

Files with missing lines	Coverage Δ
...g/grails/cli/boot/SpringApplicationLauncher.groovy	89.4737% <100.0000%> (ø)
...ils/cli/compiler/GrailsBomAstTransformation.groovy	100.0000% <100.0000%> (ø)
...ils/cli/compiler/grape/GrapeEngineInstaller.groovy	100.0000% <100.0000%> (ø)
...cli/command/NoHelpCommandArgumentsException.groovy	0.0000% <0.0000%> (ø)
...g/grails/cli/command/NoSuchCommandException.groovy	0.0000% <0.0000%> (ø)
...ails/cli/compiler/CompilerAutoConfiguration.groovy	0.0000% <0.0000%> (ø)
...ls/cli/compiler/GroovyCompilerConfiguration.groovy	0.0000% <0.0000%> (ø)
.../SpringBootDependenciesDependencyManagement.groovy	85.7143% <83.3333%> (ø)
...ultRepositorySystemSessionAutoConfiguration.groovy	87.5000% <95.2381%> (ø)
...r/grape/DependencyResolutionFailedException.groovy	0.0000% <0.0000%> (ø)
... and 70 more

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[testlens-app]

✅ All tests passed ✅

🏷️ Commit: 68b4680
▶️ Tests: 82575 executed
⚪️ Checks: 84/84 completed

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