Allowed more "ref" lines in commit messages

[EvanHahn]

no ref

This change should have no user impact. It just quiets a development-only warning.

Before this change, our pre-commit hook showed a warning unless your commit's third line started with "ref", "fixes", or "closes".

Now it supports a wide array of options. These are lifted from some our internal document, "How to write commit messages".

[coderabbitai]

Walkthrough

This PR updates the commit-msg validation hook to accept a broader set of issue-link keywords on the third line of commit messages. The validation regex is expanded to recognize ref, close, fixes, related to, contributes to, and no ref notations instead of a limited set. The error message and validation warning text are updated to reflect this wider keyword support.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: expanding the set of allowed 'ref' keywords in commit message validation.
Description check	✅ Passed	The description is directly related to the changeset, explaining the motivation and nature of the commit-msg hook update.
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.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch update-commit-ref-check

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