feat: add support for dual frontend (JS and React) in the CCW application

- Updated CLI to include `--frontend` option for selecting frontend type (js, react, both).
- Modified serve command to start React frontend when specified.
- Implemented React frontend startup and shutdown logic.
- Enhanced server routing to handle requests for both JS and React frontends.
- Added workspace selector component with i18n support.
- Updated tests to reflect changes in header and A2UI components.
- Introduced new Radix UI components for improved UI consistency.
- Refactored A2UIButton and A2UIDateTimeInput components for better code clarity.
- Created migration plan for gradual transition from JS to React frontend.

ccw/frontend/package.json

@@ -22,6 +22,8 @@
     "@radix-ui/react-checkbox": "^1.3.3",
     "@radix-ui/react-dialog": "^1.1.0",
     "@radix-ui/react-dropdown-menu": "^2.1.0",
+    "@radix-ui/react-label": "^2.1.8",
+    "@radix-ui/react-progress": "^1.1.8",
     "@radix-ui/react-select": "^2.1.0",
     "@radix-ui/react-tabs": "^1.1.0",
     "@radix-ui/react-toast": "^1.2.0",