add opennextjs/cloudflare dev dependency to commerce example app

Author: dario-piotrowicz

examples/vercel-commerce/package.json

@@ -25,6 +25,7 @@
     "wrangler": "catalog:"
   },
   "devDependencies": {
+    "@opennextjs/cloudflare": "workspace:*",
     "@tailwindcss/container-queries": "^0.1.1",
     "@tailwindcss/typography": "^0.5.13",
     "@types/node": "20.14.12",