chore(hooks): chain .githooks to global co-author stripping hooks

[chuks-qua]

What

Adds prepare-commit-msg and post-commit hooks to .githooks/ that chain to the user-level hooks at ~/.git-hooks/.

Why

This repo sets core.hooksPath = .githooks, which bypasses the global ~/.git-templates hooks directory. Without chaining hooks in place, the user-level co-author stripping hooks never run in this repo, and AI co-author lines leak into commits.

Key changes

• .githooks/prepare-commit-msg - chains to ~/.git-hooks/prepare-commit-msg if executable
• .githooks/post-commit - chains to ~/.git-hooks/post-commit if executable
• Both hooks are safe to re-install (idempotent via # --- chained-to-global-hooks --- marker)

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Summary by CodeRabbit

• Chores
  • Enhanced Git hooks configuration to enable custom global commit workflow integration for development processes.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 66011790-247f-4714-8b0e-891e22a7d691

📥 Commits

Reviewing files that changed from the base of the PR and between c05b279 and bccb2e2.

📒 Files selected for processing (2)

• .githooks/post-commit
• .githooks/prepare-commit-msg

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📝 Walkthrough

Walkthrough

Two Git hook scripts are added to the .githooks/ directory. Both post-commit and prepare-commit-msg implement a delegation pattern: each checks for a corresponding executable global hook in the user's home directory and invokes it with original arguments if present.

Changes

Git hook delegation to global hooks

Layer / File(s)	Summary
Git hook delegation .githooks/post-commit, .githooks/prepare-commit-msg	Both hooks implement the same pattern: check for an executable global hook at ~/.git-hooks/post-commit and $HOME/.git-hooks/prepare-commit-msg respectively, and invoke it with the original CLI arguments if it exists.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Poem

A rabbit hops through git's great hall,
Two hooks to catch them one and all—
Post-commit and prepare-msg dance,
Delegating with elegant prance. 🐰

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: adding Git hook chaining to global hooks for co-author stripping, matching the actual file additions and purpose.
Description check	✅ Passed	The description includes all required template sections (What, Why, Key Changes) with clear explanations; Config Changes section appropriately marked as None.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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

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