created a demo mode for the guest pwa

resources/js/guest/main.tsx

@@ -6,8 +6,12 @@ import '../../css/app.css';
 import { initializeTheme } from '@/hooks/use-appearance';
 import { ToastProvider } from './components/ToastHost';
 import { LocaleProvider } from './i18n/LocaleContext';
+import { enableGuestDemoMode, shouldEnableGuestDemoMode } from './demo/demoMode';
 
 initializeTheme();
+if (shouldEnableGuestDemoMode()) {
+  enableGuestDemoMode();
+}
 const rootEl = document.getElementById('root')!;
 
 // Register a minimal service worker for background sync (best-effort)