add cra prebuild clean

Author: jordaaash

packages/app/create-react-app/package.json

@@ -23,6 +23,7 @@
         "clean": "shx mkdir -p build && shx rm -rf build",
         "start": "react-scripts start",
         "build": "react-scripts build",
+        "prebuild": "pnpm run clean",
         "test": "react-scripts test",
         "eject": "react-scripts eject"
     },