feat: implement RAG dashboard with MUI and react-router

Add new RAG dashboard feature including:
- Main application layout with header and sidebar
- Multiple pages (Home, KnowledgeBase, PipelineConfig, Dashboard, MCP)
- Theme configuration and styling
- Routing setup with protected routes
- Login page and authentication flow
- Various UI components and mock data for dashboard views

package.json

@@ -10,8 +10,14 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@emotion/react": "^11.14.0",
+    "@emotion/styled": "^11.14.1",
+    "@mui/icons-material": "^7.3.4",
+    "@mui/material": "^7.3.4",
     "react": "^18.3.1",
-    "react-dom": "^18.3.1"
+    "react-dom": "^18.3.1",
+    "react-is": "18.3.1",
+    "react-router-dom": "^7.9.4"
   },
   "devDependencies": {
     "@eslint/js": "^9.36.0",