Refactor Site Builder Integration and Update Docker Configuration

- Merged the site builder functionality into the main app, enhancing the SiteBuilderWizard component with new steps and improved UI.
- Updated the Docker Compose configuration by removing the separate site builder service and integrating its functionality into the igny8_sites service.
- Enhanced Vite configuration to support code-splitting for builder routes, optimizing loading times.
- Updated package dependencies to include new libraries for state management and form handling.

sites/src/App.tsx

@@ -1,16 +1,52 @@
-import { BrowserRouter, Routes, Route } from 'react-router-dom';
-import SiteRenderer from './pages/SiteRenderer';
+import { lazy, Suspense } from 'react';
+import { BrowserRouter, Routes, Route, Navigate } from 'react-router-dom';
+import ProtectedRoute from './shared/ProtectedRoute';
+import BuilderLayout from './builder/components/layout/BuilderLayout';
+
+// Lazy load builder pages (code-split to avoid loading in public sites)
+const WizardPage = lazy(() => import('./builder/pages/wizard/WizardPage'));
+const PreviewCanvas = lazy(() => import('./builder/pages/preview/PreviewCanvas'));
+const SiteDashboard = lazy(() => import('./builder/pages/dashboard/SiteDashboard'));
+
+// Renderer pages (load immediately for public sites)
+const SiteRenderer = lazy(() => import('./renderer/pages/SiteRenderer'));
+
+// Loading component
+const LoadingFallback = () => (
+  <div style={{ display: 'flex', justifyContent: 'center', alignItems: 'center', minHeight: '100vh' }}>
+    <div>Loading...</div>
+  </div>
+);
 
 function App() {
   return (
     <BrowserRouter>
-      <Routes>
-        <Route path="/:siteId/*" element={<SiteRenderer />} />
-        <Route path="/" element={<div>IGNY8 Sites Renderer</div>} />
-      </Routes>
+      <Suspense fallback={<LoadingFallback />}>
+        <Routes>
+          {/* Public Site Renderer Routes (No Auth) */}
+          <Route path="/:siteId/*" element={<SiteRenderer />} />
+          <Route path="/" element={<div>IGNY8 Sites Renderer</div>} />
+          
+          {/* Builder Routes (Auth Required) */}
+          <Route
+            path="/builder/*"
+            element={
+              <ProtectedRoute>
+                <BuilderLayout>
+                  <Routes>
+                    <Route path="/" element={<WizardPage />} />
+                    <Route path="preview" element={<PreviewCanvas />} />
+                    <Route path="dashboard" element={<SiteDashboard />} />
+                    <Route path="*" element={<Navigate to="/builder" replace />} />
+                  </Routes>
+                </BuilderLayout>
+              </ProtectedRoute>
+            }
+          />
+        </Routes>
+      </Suspense>
     </BrowserRouter>
   );
 }
 
 export default App;
-