amis打包太大

#### 描述问题：

``amis``打包太大了，详情看[打包分析](https://dev.iotn2n.com/report.html)
打包后的总文件大小``33.39mb``,其中``amis``占``9.4mb``，``amis``依赖包``monaco-editor``占``15.64md``
#### 截图或视频：


#### 如何复现（请务必完整填写下面内容）：

1. 你是如何使用 amis 的？
``npm``

2. amis 版本是什么？请先在最新 beta 版本测试问题是否存在
``amis:1.5.3``
3. 粘贴有问题的完整 `amis schema` 代码：
```
[report.html](https://dev.iotn2n.com/report.html)
```

Start with the linked report.html and verify the reported bundle composition for amis and its monaco-editor dependency. Trace the package entry points and build output responsible for the reported sizes, then compare a rebuilt bundle against the report; done means the bundle is measurably smaller without breaking the reported amis usage.

Written by the indexing model from the issue text.