fix: register ViteBundle, add config, share vendor volume with node, add vite-plugin-symfony

- Add PentatrionViteBundle to bundles.php (Flex recipe didn't auto-register)
- Create pentatrion_vite.yaml config
- Share vendor named volume with node container (needed for file: npm deps)
- Add vite-plugin-symfony to package.json devDependencies

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.override.yaml

@@ -23,9 +23,12 @@ services:
       target: dev
     volumes:
       - .:/app
+      - vendor:/app/vendor
       - node_modules:/app/node_modules
     ports:
       - "5173:5173"
+    depends_on:
+      - app
 
 volumes:
   vendor: