Enhance site layout rendering and integrate shared components

- Added read-only access to shared frontend components in `docker-compose.app.yml`.
- Updated TypeScript configuration in `tsconfig.app.json` and `tsconfig.json` to support path mapping for shared components.
- Modified CSS imports in `index.css` to accommodate shared styles.
- Refactored layout rendering logic in `layoutRenderer.tsx` to utilize shared layout components for various site layouts.
- Improved template rendering in `templateEngine.tsx` by integrating shared block components for better consistency and maintainability.

sites/tsconfig.app.json

@@ -14,6 +14,12 @@
     "noEmit": true,
     "jsx": "react-jsx",
 
+    /* Path mapping */
+    "baseUrl": ".",
+    "paths": {
+      "@shared/*": ["../frontend/src/components/shared/*"]
+    },
+
     /* Linting */
     "strict": true,
     "noUnusedLocals": true,