chore: 添加 packageManager 字段到 package.json

package.json

@@ -4,6 +4,7 @@
   "version": "3.14.0",
   "unibest-version": "3.14.0",
   "update-time": "2025-09-07",
+  "packageManager": "pnpm@10.10.0",
   "description": "unibest - 最好的 uniapp 开发模板",
   "generate-time": "用户创建项目时生成",
   "author": {