Add backend and frontend structure with routing, components, and styling

- Implemented Express server with CORS and dotenv support
- Created basic routing with React Router in frontend
- Added Admin and Home components with navigation
- Integrated MainForm component for user input
- Updated package.json and package-lock.json with new dependencies
- Styled components using Tailwind CSS and Lucide icons
- Added error handling in server
- Created initial EJS view for backend

frontend/package.json

@@ -11,8 +11,10 @@
   },
   "dependencies": {
     "@tailwindcss/vite": "^4.1.11",
+    "lucide-react": "^0.539.0",
     "react": "^19.1.1",
     "react-dom": "^19.1.1",
+    "react-router-dom": "^7.8.0",
     "tailwind-merge": "^3.3.1",
     "tailwindcss": "^4.1.11",
     "tailwindcss-animate": "^1.0.7",