✨ feat(init)!: add prepare-commit-msg hook

[welpo]

Summary

• Add --init prepare-commit-msg to create a prepare-commit-msg hook. This hook uses the hidden --prepare-commit-message flag to prepend the description of enabled rules to the commit message template.
• Renames --init hook to --init commit-msg
• Adds --init hooks option to initialize both hooks.

BREAKING CHANGE: --init hook has been replaced by --init commit-msg.

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How has this been tested?

• [X] Manual tests
• [ ] Unit tests
• [X] Integration tests

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Type of change

• [ ] Bug fix (fixes an issue without altering functionality)
• [X] New feature (adds non-breaking functionality)
• [X] Breaking change (alters existing functionality)
• [ ] UI/UX improvement (enhances user interface without altering functionality)
• [ ] Refactor (improves code quality without altering functionality)
• [ ] Documentation update
• [ ] Other (please describe below)

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Checklist

• [X] I have read the contributing guidelines.
• [X] I have added tests to cover my changes.
• [X] All new and existing tests passed.
• [X] My code follows the code style of this project.
• [X] I have formatted the code with cargo fmt.
• [X] My change requires updating the documentation.
• [X] I have updated the documentation accordingly.

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (9041419) 95.83% compared to head (f045bbe) 96.50%.

Files	Patch %	Lines
src/config.rs	98.80%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #13 +/- ## ========================================== + Coverage 95.83% 96.50% +0.66% ========================================== Files 10 10 Lines 624 686 +62 ========================================== + Hits 598 662 +64 + Misses 26 24 -2 ```

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