test that flutter_rust_bridge works

src-react/.vscode/settings.json

@@ -14,9 +14,11 @@
     "editor.formatOnSave": true
   },
   "[typescriptreact]": {
+    "editor.defaultFormatter": "esbenp.prettier-vscode",
     "editor.formatOnSave": true
   },
   "[javascriptreact]": {
+    "editor.defaultFormatter": "esbenp.prettier-vscode",
     "editor.formatOnSave": true
   }
 }