Draft - Cucumber Message Format

[Johnlon]

🤔 What's changed?

Draft providing Cucumber Messages support - work in progress.

- :zap: New feature (non-breaking change which adds new behaviour) ### ♻️ Anything particular you want feedback on?

📋 Checklist:

• [x] 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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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 79.69%. Comparing base (153db4e) to head (c611755). Report is 9 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #627 +/- ## ========================================== - Coverage 83.21% 79.69% -3.52% ========================================== Files 28 40 +12 Lines 3413 3113 -300 ========================================== - Hits 2840 2481 -359 - Misses 458 513 +55 - Partials 115 119 +4 ```

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