Add skipRemovingUnusedImports and skipReflowingLongStrings

[andreasfolkesson]

Add support for additional Google Java Format options

Summary

• Add skipRemovingUnusedImports configuration option to control unused import removal
• Add skipReflowingLongStrings configuration option to control string wrapping behavior

Changes Made

• New configuration options: Added two new boolean parameters to control formatting behavior
  • skipRemovingUnusedImports - defaults to false (removes unused imports by default)
  • skipReflowingLongStrings - defaults to true (skips string reflowing for backwards compatibility)
• Documentation: Updated README.md with configuration examples and descriptions for new options
• Maven integration: Added new parameters to AbstractFMT with proper @parameter annotations

Backwards Compatibility

• skipReflowingLongStrings defaults to true to maintain existing behavior
• skipRemovingUnusedImports defaults to false to maintain existing import removal behavior
• All existing configurations continue to work without changes

Closes #197