сhore: eslint prettier config

[saijaku0]

Summary

Adds ESLint and Prettier shared configuration to keep code style consistent across all contributors.

Changes

• .eslintrc.json — ESLint config with webextensions: true to support chrome.* API
• .prettierrc — Prettier config with single quotes, 2 space indentation, trailing commas
• .prettierignore — excludes node_modules, dist, icons, and JSON files
• .gitattributes — enforces LF line endings to avoid CRLF issues on Windows
• .github/workflows/lint.yml — GitHub Actions workflow that runs lint automatically on every PR to main

Why

Without a shared config, each contributor's formatter produces different output which makes diffs hard to review (as seen in #41).

Note

Existing files are intentionally left unformatted to keep this PR focused. Formatting of existing code can be done in a separate PR.

How to test

1. Run npm run lint — should pass with no errors
2. Run npm run format — should format files consistently
3. Open a PR and verify the lint workflow runs automatically

[Shantanugupta43]

Hey! Just checking if the PR ready for review? It looks like the lint step is failing in CI. Happy to help fix it if needed.

[saijaku0]

Hey! Yes, the lint is failing because the existing files don't match the new Prettier config yet. I intentionally didn't format them in this PR to avoid a huge noisy diff (similar to what happened in #41). The idea was to add the config first, then format all files in a separate follow-up PR. Happy to do it either way — let me know your preference!

[Shantanugupta43]

Sure you can if u add the config first, then format all files in a separate follow-up PR cheers

[saijaku0]

Hey! Fixed all ESLint errors:

• Wrapped const declaration in case 'testConnection' with braces
• Removed unnecessary escape characters in form-detector.js and groq-service.js
• Removed unused currentSuggestions variable in popup.js

CI should pass now. Ready for review!

[saijaku0]

@Shantanugupta43 bro check it

[Shantanugupta43]

Would do give me 2-5 days.

[saijaku0]

Yeah sure take your time