translations_cleaner

• Widen analyzer constraint to >=8.0.0 <11.0.0 so the package resolves alongside intl_utils ^2.8.14 and modern Flutter test tooling.
• Migrate AST scan to the renamed diagnostic API (diagnosticCode / DiagnosticType) since errorCode / ErrorType were removed in analyzer 9.0.0.
• Raise minimum Dart SDK to 3.9.0 to match analyzer 8.x's environment constraint.

• Switched from regex to AST based searching improving search time speeds by 100x.

Bug Fixes

• Handle invalid JSON in sort-translations so one malformed ARB file does not abort the whole command.

Breaking Changes

• Dart 3.x required: Updated SDK constraint from >=2.17.6 <3.0.0 to >=3.0.0 <4.0.0
• Subpackages excluded by default: Arb files in subpackages (directories with their own pubspec.yaml) are now excluded by default. Use --include-subpackages or -s flag to include them.

Bug Fixes

• Fix #10: Preserve original indentation when writing arb files instead of forcing 4-space indent
• Fix #9: Handle malformed JSON in arb files gracefully with helpful error messages instead of crashing
• Fix #5: Use word boundary matching to prevent false negatives (e.g., restorePurchases no longer matches restorePurchasesAsync)
• Fix #6, #7, #11: Exclude subpackages by default to prevent false positives in monorepo setups

• Added 2 commands, for showing list of unused translations and for deleting them
• Unused translations can be exported to a .txt file to the desired path
• abort flag exits process with failure if there are any unused translations. This feature is useful for being used in CI, if the build should fail if there exists any unused translations

• Initial version.