ci: use yarn

package.json

@@ -11,10 +11,8 @@
   },
   "dependencies": {
     "@astrojs/check": "^0.4.1",
-    "@astrojs/node": "^8.3.2",
     "@astrojs/react": "^3.6.0",
     "@astrojs/tailwind": "^5.1.0",
-    "@astrojs/vercel": "^7.7.2",
     "@radix-ui/react-checkbox": "^1.1.1",
     "@radix-ui/react-icons": "^1.3.0",
     "@radix-ui/react-label": "^2.1.0",
@@ -38,8 +36,8 @@
     "@types/leaflet": "^1.9.12",
     "@types/react": "^18.3.3",
     "@types/react-dom": "^18.3.0",
-    "@types/bun": "^1.1.6",
     "@types/google.maps": "^3.55.11",
     "@types/toastify-js": "^1.12.3"
-  }
+  },
+  "packageManager": "yarn@1.22.22+sha512.a6b2f7906b721bba3d67d4aff083df04dad64c399707841b7acf00f6b133b7ac24255f2652fa22ae3534329dc6180534e98d17432037ff6fd140556e2bb3137e"
 }