[Ruby] Gem Bump

[luke-hill]

🤔 What's changed?

Progressively updating lots of the supported packages.

• cck has gone from v12 to v15
• Rubocop subgems have all been updated 6-9months newer (Still a WIP)
• Rubocop Performance introduced to codebase (Currently not actively remedied)
• Rake / RSpec updated to latest support
• Ruby minimum gone from 2.5 to 3.0
  • This has introduced new cop offenses and the ability to use Ruby 2.6+ and Ruby 3.0+ idioms
• Minimum Rubygems updated to 3.2.3 to solve CI niggles

Updated file formats for non-generated files to be 1 class per file

• ID Generation split into 2 files (UUID/Incrementing)

Message class simplified

• Deserialization logic was very simple and only used in the Message class so this has been absorbed and helper module removed
• Utils logic was only included in 2 areas (Only used in 1), so this also has been removed as a helper module and absorbed into the class proper

Miscellaneous changes

• Acceptance tests now recurse correctly through all CCK examples instead of having a procedural code execution for the whole glob of CCK examples
• The dummy messages used in a few specs have now been correctly setup inside spec/support and are now in a place to be properly extracted further into shared context's when the time allows

⚡️ What's your motivation?

Actually keeping things up to date

🏷️ What kind of change is this?

• 🏦 Refactoring/debt/DX (improvement to code design, tooling, etc. without changing behaviour)
• 🐛 Bug fix (non-breaking change which fixes a defect)
• 💥 Breaking change (incompatible changes to the API)

♻️ Anything particular you want feedback on?

📋 Checklist:

• I agree to respect and uphold the Cucumber Community Code of Conduct
• I've changed the behaviour of the code
  • I have added/updated tests to cover my changes.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• Users should know about my change
  • I have added an entry to the "Unreleased" section of the CHANGELOG, linking to this pull request.

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