v0.88.0

• Refactored Finder class to extract file system traversal logic into a new
  Utils::Finder::Files module
• Added support for searching specific files via a new :files option in the
  Finder constructor
• Implemented git ls-files integration with -g flag for tracking only
  git-tracked files
• Updated command-line argument parsing in the discover utility to include the
  new -g flag
• Simplified the Finder class interface by consolidating search methods
• Updated RDoc documentation with examples for the Finder class
• Maintained backward compatibility for all existing Finder functionality
• Updated gemspec to include the new lib/utils/finder/files.rb file in both
  extra_rdoc_files and files lists