Add Forgejo Actions workflows for automated Flutter validation on PRs:
- flutter-analyze.yml: runs dart analyze --fatal-infos on all 8 packages/apps
- flutter-test.yml: runs flutter test per package with pass/fail reporting
- Aggregate test result summary table in workflow output
- Workflows trigger on PRs to main and all non-main branch pushes
- Uses ghcr.io/cirruslabs/flutter:stable container image
Populate tools/ directory with CI helper scripts:
- run_all_tests.sh: local test runner with optional --analyze flag
- README.md: documents scripts and CI workflow inventory
Validated locally:
- dart analyze: all 8 packages/apps clean (no issues)
- core: 20/20 tests passed
- design_system: 41/41 tests passed
- feature_wordpress: 294/294 tests passed
- kell_web: 24/24 tests passed
- Total: 379/379 tests passed
