Update Ruby version to 3.3

[justin808]

Summary

Updates the project from Ruby 2.7/3.0 to Ruby 3.3 to take advantage of the latest Ruby features and improvements. Ruby 3.3 is the current stable release with better performance and modern features.

Changes

• Updated GitHub Actions workflows (.github/workflows/ruby.yml and rubocop.yml) to use Ruby 3.3
• Replaced pry-byebug with debug gem (standard library in Ruby 3.0+) for better Ruby 3.3+ compatibility
• Rebuilt Gemfile.lock with Ruby 3.3 dependencies

Pull Request checklist

• [x] Update documentation
• ~[ ] Add/update test to cover these changes~
• ~[ ] Update CHANGELOG file~