feat: add professional three-branch release workflow automation (#1129)

- Add version-bump workflow for semantic versioning across all files
- Add beta-release workflow for automated pre-release testing
- Add production-release workflow with manual approval gates
- Add hotfix-release workflow for emergency patches
- Create comprehensive CONTRIBUTING.md with workflow guide
- Create detailed RELEASE_PROCESS.md for maintainers
- Add PR template with release checklists
- Update CODEOWNERS to protect workflow files
- Update README with contribution links
- Remove /docs from .gitignore to allow documentation

This implements a dev  beta  main branching strategy with:
- Automated version management across 6 files
- Changelog generation from conventional commits
- GitHub Releases with build artifacts
- Environment-based approvals for production
- Back-merge support for hotfixes

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,65 @@
+## Description
+<!-- Provide a brief description of your changes -->
+
+
+
+## Type of Change
+<!-- Mark the relevant option with an 'x' -->
+
+- [ ] 🐛 Bug fix (non-breaking change which fixes an issue)
+- [ ] ✨ New feature (non-breaking change which adds functionality)
+- [ ] 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] 📝 Documentation update
+- [ ] 🎨 UI/UX improvement
+- [ ] ⚡ Performance improvement
+- [ ] 🔧 Maintenance/refactoring
+
+## Testing
+<!-- Describe the tests you ran and how to reproduce them -->
+
+- [ ] Tested on Chrome/Edge
+- [ ] Tested on Firefox
+- [ ] Tested on Safari (if applicable)
+- [ ] Checked console for errors
+- [ ] Tested in different screen sizes
+
+## Checklist
+
+### General
+- [ ] My code follows the project's code style
+- [ ] I have performed a self-review of my own code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] My changes generate no new warnings or errors
+- [ ] I have tested my changes locally
+
+### For Feature/Bug Fix PRs
+- [ ] I have added/updated tests that prove my fix is effective or that my feature works
+- [ ] New and existing unit tests pass locally with my changes
+- [ ] I have updated the documentation accordingly
+
+### For Release PRs (beta → main)
+<!-- Only fill out if this is a release PR -->
+- [ ] Version has been bumped in all necessary files
+- [ ] Changelog has been updated
+- [ ] Beta testing period completed (minimum X days)
+- [ ] All critical bugs from beta have been resolved
+- [ ] Extension has been tested by at least X beta testers
+- [ ] No open P0/P1 issues blocking release
+- [ ] Release notes prepared
+- [ ] Store submission credentials verified
+
+## Screenshots (if applicable)
+<!-- Add screenshots to help explain your changes -->
+
+
+
+## Related Issues
+<!-- Link any related issues here -->
+
+Closes #
+Relates to #
+
+## Additional Notes
+<!-- Any additional information for reviewers -->
+
+