feat: add auth setup and login flow

package.json

@@ -39,14 +39,17 @@
     "lucide-react": "^0.548.0",
     "motion": "^12.38.0",
     "next": "16.0.10",
+    "next-auth": "^4.24.14",
     "next-themes": "^0.4.6",
     "radix-ui": "^1.4.3",
     "react": "19.2.0",
     "react-dom": "19.2.0",
+    "react-hook-form": "^7.79.0",
     "react-leaflet": "^5.0.0",
     "recharts": "2.15.4",
     "sonner": "^1.7.4",
-    "tailwind-merge": "^3.3.1"
+    "tailwind-merge": "^3.3.1",
+    "zustand": "^5.0.14"
   },
   "devDependencies": {
     "@tailwindcss/postcss": "^4.1.9",