refactor: reorganize project structure for better maintainability

- Move Docker files to build/docker/
- Move CI/CD configs to build/ci/
- Move deployment configs to deploy/ (helm, k8s, argocd)
- Move config files to config/
- Move scripts to tools/
- Consolidate assets to assets/ (Reflex compatible)
- Add data/ directory for local data (gitignored)
- Update all path references in Makefile, Dockerfile, CI configs
- Add comprehensive README files for build/ and deploy/
- Update project documentation

Benefits:
- Clear separation of concerns
- Cleaner root directory
- Better developer experience
- Enterprise-grade structure
- Improved maintainability

.gitignore

@@ -8,7 +8,6 @@ __pycache__/
 *$py.class
 *.so
 .Python
-build/
 develop-eggs/
 dist/
 downloads/
@@ -27,6 +26,9 @@ venv/
 env/
 ENV/
 
+# Local data directory
+data/
+
 # Reflex
 .web/
 .reflex/