fix: 修复 extension/ vue-node-registry相关 bug，优化文档加载速度

[boyongjiong]

• fix(extension): 解决 Menu 插件 setMenuByType 为私有方法导致用户无法调用的 bug
  close [Bug Report]: Menu插件的setMenuByType方法为私有属性 #1773

• fix(vue-node-registry): 定位 Teleport + KeepAlive 场景下DOM 渲染两个的问题原因

• 增加复现 Demo 在 vue3-app 中

• docs: 移除旧版本文档中首页 Demo 相关文件

• docs: 升级 dumi-theme-logicflow 包为 0.0.19，将 @babel/standalone 按需加载

[changeset-bot]

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