表单中动态列表（列表项是基础控件甚至包含列表）如何处理？

很好的设计，迫不及待的看了下文档。

### 问题：动态列表如何实现
比如下方的user，需要表单中可交互，编辑各项的值及列表长度（可增减列表），该列表由多个基础（甚至包含其他动态列表）控件组成。
```js
formData: {
name: "",
note: "good",
city: "hangzhou",
user: [
{
nickName: '',
name: ''
}
]
}
```

The issue names no files, tests, or entry points. Start by locating the form component and its handling of array-valued fields, then clarify expected behavior for editing, adding, removing, and nesting list items; completion requires an agreed design and implementation scope.

Written by the indexing model from the issue text.