feat: add comprehensive CI/CD pipeline with auto-promotion and testing

🚀 Enhanced GitHub Actions workflows:
- Add Playwright testing to all deployment pipelines
- Implement auto-promotion from develop → staging → master
- Add visual regression testing with screenshot artifacts
- Create PR validation workflow with local testing
- Add performance testing and health checks
- Implement timestamped artifact uploads
- Add comprehensive test result reporting
- Include Kubernetes manifest validation

🧪 Testing improvements:
- Multi-browser testing (Chrome, Firefox, Safari)
- Mobile device testing (Pixel 5, iPhone 12)
- Environment-specific test validation
- Security header validation
- Health endpoint testing
- Performance benchmarking

🔄 Auto-promotion flow:
- develop → staging (automatic PR creation after tests pass)
- staging → master (automatic PR creation after tests pass)
- Manual review required for production deployment
- Full test validation at each stage

curl-format.txt

@@ -0,0 +1,10 @@
+     time_namelookup:  %{time_namelookup}\n
+        time_connect:  %{time_connect}\n
+     time_appconnect:  %{time_appconnect}\n
+    time_pretransfer:  %{time_pretransfer}\n
+       time_redirect:  %{time_redirect}\n
+  time_starttransfer:  %{time_starttransfer}\n
+                     ----------\n
+          time_total:  %{time_total}\n
+       response_code:  %{response_code}\n
+            size_download:  %{size_download}\n