Add tailwind to dashboard

Author: patrick91

backend/dashboard/package.json

@@ -13,9 +13,11 @@
     "react-dom": "19.2.8"
   },
   "devDependencies": {
+    "@tailwindcss/vite": "4.3.3",
     "@types/react": "19.2.18",
     "@types/react-dom": "19.2.4",
     "@vitejs/plugin-react": "6.0.5",
+    "tailwindcss": "4.3.3",
     "typescript": "7.0.2",
     "vite": "8.2.0"
   }