fix: make commit update detached HEAD

[Andarist]

I'm fixing a bug or typo

• squash merge the PR with commit message "fix: [Description of fix]"

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This matches the git's behavior.

Summary by CodeRabbit

• Bug Fixes
  • Fixed commit handling to properly support detached HEAD state, ensuring HEAD updates correctly when making commits in this scenario.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

📝 Walkthrough

Walkthrough

The pull request adds support for making commits in a detached HEAD state. The implementation detects when the repository is in detached HEAD mode and directly updates the HEAD reference instead of updating a branch pointer. A new test case validates this behavior.

Changes

Cohort / File(s)	Summary
Detached HEAD state handling src/commands/commit.js	Introduces logic to detect detached HEAD state by reading the HEAD reference. When in detached HEAD state, the commit reference is updated directly to HEAD instead of to a branch pointer.
Test coverage for detached HEAD __tests__/test-commit.js	Adds a new test case that verifies the commit operation correctly updates HEAD when the repository is in detached HEAD state, ensuring the new commit becomes the current HEAD with proper parent linkage to the original HEAD commit.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 A detached HEAD hops so free,
No branch to bind, just HEAD you see,
Our commit lands where it should be,
Hopping direct, as wild as can be! 🌟

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: fixing the commit command to properly update HEAD when in detached HEAD state.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

• 📝 Generate docstrings

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[jcubic]

Looks good

[isomorphic-git-bot]

🎉 This PR is included in version 1.36.3 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[jcubic]

Thanks for the fix.