[Bug report]最新 2.11.1 版本好像插件与插件之间存在兼容问题，构建和运行报错 Cannot redefine property: __pluginName

**问题描述**

构建运行都报错 Cannot redefine property: __pluginName

@mpxjs/unocss-plugin 从 CJS 改成了 ESM（"type": "module"），但配套的 @mpxjs/vue-cli-plugin-mpx-utility-first-css 仍然用 require() 加载它，导致兼容性问题

麻烦有空确认一下是否存在这个问题

Inspect how @mpxjs/vue-cli-plugin-mpx-utility-first-css loads @mpxjs/unocss-plugin, focusing on the ESM/CJS boundary described in the report. Reproduce a build and run with version 2.11.1; done means the Cannot redefine property: __pluginName error no longer occurs.

Written by the indexing model from the issue text.