chore: Move development files to gitignore (keep locally)

Removed from repository but kept locally for development:
- .github/workflows/ - GitHub Actions (Gitea uses .gitea/workflows/)
- frontend/e2e/ - Playwright E2E tests (development only)

Added to .gitignore:
- .github/ - GitHub-specific CI/CD (not used on Gitea)
- frontend/e2e/ - E2E tests kept locally for testing
- **/playwright-report/ - Test result reports
- **/test-results/ - Test artifacts

These files remain on local machine for development/testing
but are excluded from repository to reduce clutter.

Note: Gitea uses .gitea/workflows/ for CI, not .github/workflows/

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitignore

@@ -64,6 +64,14 @@ jspm_packages/
 # AI context files
 CLAUDE.md
 
+# CI/CD (GitHub-specific, not needed for Gitea)
+.github/
+
+# E2E tests (keep locally for development, don't commit)
+frontend/e2e/
+**/playwright-report/
+**/test-results/
+
 # OS generated files
 .DS_Store
 .DS_Store?