ci: improve lint-pr-title action

[yogeshchoudhary147]

Summary

• Move commitlint.config.mjs into .github/actions/lint-pr-title/ — it's action-specific, not repo-wide
• Add .npmrc with omit-lockfile-registry-resolved=true to strip internal registry URLs from the lock file
• Commit package-lock.json for reproducible, cacheable installs and switch to npm ci
• Add reopened to workflow trigger types so validation runs when a closed PR is reopened
• Simplify ESM imports and pass parserOpts from load() into lint()

Summary by CodeRabbit

• Bug Fixes
  • Pull request title checks now also run when a pull request is reopened.
  • Commit title validation now consistently applies the configured commit rules and linting/parsing options.
• Chores
  • Improved automated check setup by using a clean install method for the title linting action.
  • Prevented install scripts from running and reduced lockfile registry metadata noise.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 32073d33-5a1d-4ef4-8878-6401bd04dc38

📥 Commits

Reviewing files that changed from the base of the PR and between b29238b and f47fbd1.

📒 Files selected for processing (1)

• .github/workflows/lint-pr-title.yml

🚧 Files skipped from review as they are similar to previous changes (1)

• .github/workflows/lint-pr-title.yml

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📝 Walkthrough

Walkthrough

The PR title linting action now uses local commitlint rules and parser options, resolves configuration from its action directory, and installs dependencies with npm ci. The workflow also runs when pull requests are reopened and applies action-local npm settings.

Changes

PR title linting

Layer / File(s)	Summary
Commitlint configuration and runtime .github/actions/lint-pr-title/commitlint.config.mjs, .github/actions/lint-pr-title/src/index.js	Defines commit type and subject rules, loads configuration relative to the action directory, and passes configured parser options to commitlint.
Workflow triggers and dependency installation .github/actions/lint-pr-title/.npmrc, .github/workflows/lint-pr-title.yml	Adds action-local npm settings, triggers linting for reopened pull requests, and replaces npm install with npm ci.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• auth0/auth0-spa-js#1635: Updates npm configuration and workflow dependency installation in a related manner.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title is concise and accurately describes the main change set: improvements to the lint-pr-title action.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/lint-pr-title

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