feat: login & check user

package.json

@@ -20,10 +20,12 @@
     "clsx": "^2.1.1",
     "jotai-zustand": "^0.6.0",
     "lucide-react": "^0.454.0",
+    "next-themes": "^0.3.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "react-hook-form": "^7.53.1",
     "react-router-dom": "^6.27.0",
+    "sonner": "^1.6.1",
     "tailwind-merge": "^2.5.4",
     "tailwindcss-animate": "^1.0.7",
     "zod": "^3.23.8",