chore: @remix-run/cloudflare as optionalDependencies (#37)

Author: yusukebe

package-lock.json

@@ -80,9 +80,10 @@
   },
   "optionalDependencies": {
     "@hono/node-server": "*",
+    "@remix-run/cloudflare": "*",
     "@remix-run/node": "*"
   },
   "engines": {
     "node": ">=18.0.0"
   }
-}
+}