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.

docker-compose.app.yml

@@ -116,6 +116,7 @@ services:
     volumes:
       - /data/app/igny8/sites:/app:rw
       - /data/app/sites-data:/sites:ro  # Read-only access to deployed sites
+      - /data/app/igny8/frontend:/frontend:ro  # Read-only access to shared components
     networks: [igny8_net]
     labels:
       - "com.docker.compose.project=igny8-app"