[CI] Add Husky + lint-staged to enforce existing lint checks at commit time

[thevanshit]

Summary

This PR adds Husky and lint-staged to automatically run the existing ESLint and Prettier checks on staged files before each commit.
The goal is to enforce the current linting and formatting workflow at commit time without introducing new rules or modifying the existing developer workflow.

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Changes

• Added husky and lint-staged as dev dependencies
• Added "prepare": "husky install" script to enable hooks automatically after npm install
• Configured lint-staged inside package.json to:
  • Run eslint --fix on *.{js,mjs} files
  • Run prettier --write on staged files
• Added .husky/pre-commit hook to trigger lint-staged

---

Behavior

• git commit now runs lint and formatting checks on staged files only
• Fixable issues (spacing, quotes, semicolons) are auto-corrected before commit
• Commits are blocked if lint errors remain
• The hook can be bypassed with git commit --no-verify
• Existing npm run lint workflow remains unchanged
• No impact on CI

---

Testing

• Verified lint-staged runs only on staged files
• Verified auto-fix behavior for formatting issues
• Verified commit fails when lint errors remain
• All existing tests pass

Closes #5864

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[Anshikakalpana]

Hi @thevanshit , I'm the one who opened this issue and had planned to implement it. I noticed the PR also includes unrelated commits (chore: remove debug console statements, Adding a PERFORMANCE.md file) — it's generally good practice to keep PRs focused on a single change. Happy to collaborate or help review if needed!

[github-actions]

❌ Some Jest tests failed. Please check the logs and fix the issues before merging.

Failed Tests:

palette.test.js
logo.test.js
logoconstants.test.js

[thevanshit]

Hi, @Anshikakalpana

I have cleaned the PR so it now contains only the Husky + lint-staged configuration changes.
I also verified that the failing Jest tests (palette.test.js, logo.test.js, logoconstants.test.js) fail on upstream/master as well, so they appear unrelated to this PR.
One thing I noticed is that adding dev dependencies caused large changes in package-lock.json due to dependency resolution.

If maintainers prefer, I can:

• minimize lockfile changes
• align versions with prior discussion in chore: automate local linting to match CI workflows #5078
• or adjust implementation based on project preference.

Happy to refine further

[github-actions]

❌ Some Jest tests failed. Please check the logs and fix the issues before merging.

Failed Tests:

palette.test.js
logo.test.js
logoconstants.test.js

[github-actions]

❌ Some Jest tests failed. Please check the logs and fix the issues before merging.

Failed Tests:

logo.test.js

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[thevanshit]

Hi @Anshikakalpana and maintainers,

I’ve addressed the feedback and refined this PR:
Cleaned the history so it now contains only the Husky + lint-staged implementation related to #5864
Resolved the failing Jest tests (including pre-existing logo test issues)
Verified CI is now fully passing

The goal remains to enforce the existing ESLint + Prettier workflow locally without introducing new rules or changing current contributor workflows.
If everything looks good, this should now be ready for review and merge. Please let me know if any further adjustments are preferred.

Thanks!

[omsuneri]

no one is going to review this PR please dont raise such a bulky pr Thanks !!