Add packageManager field to package.json

Co-authored-by: huangyiirene <7665279+huangyiirene@users.noreply.github.com>

Author: Copilot

package.json

@@ -28,5 +28,6 @@
   },
   "engines": {
     "node": ">=18.0.0"
-  }
+  },
+  "packageManager": "pnpm@10.28.0"
 }