fix: add missing PrimeReact and PrimeIcons CSS imports

Import PrimeReact and PrimeIcons CSS libraries at the app entry point
to ensure styling is loaded. This matches the Angular app which imports
these libraries in angular.json.

- primereact/resources/primereact.min.css: Base component styles
- primeicons/primeicons.css: Icon library styles

This fixes missing component styling that was relying only on custom
overrides without the base theme.

apps/react/src/main.tsx

@@ -1,6 +1,12 @@
 import './app/i18n/i18n'
 import ReactDOM from 'react-dom/client'
 import App from './app/App'
+
+// Import PrimeReact and PrimeIcons CSS
+import 'primereact/resources/primereact.min.css'
+import 'primeicons/primeicons.css'
+
+// Import global styles
 import './styles/index.scss'
 
 ReactDOM.createRoot(document.getElementById('root')!).render(