群组不支持框选/多选节点嵌入

### Describe the bug

当使用框选/多选功能时，选择多个节点
将选择的多个节点移动到群组中，群组节点只会将鼠标移动的节点嵌入群组节点内
其它被选中的节点未自动嵌入

### Your Example Website or App

https://codesandbox.io/s/vibrant-pare-yqc3if?file=/index.ts

### Steps to Reproduce the Bug or Issue

1. 将多个节点位置集中
2. 选中/框选多个节点
3. 移动框选中的子节点到群组节点内

### Expected behavior

群组节点支持批量嵌入功能
embedding中的findParent、validate支持批量节点的验证

### Screenshots or Videos


### Platform

- OS: [e.g. macOS, Windows, Linux]
- Browser: [e.g. Chrome, Safari, Firefox]
- Version: [e.g. 91.1]

### Additional context

_No response_

Reproduce the behavior in the linked CodeSandbox by selecting multiple nodes and moving them into a group. Start with the embedding findParent and validate paths mentioned in the issue; done means all selected nodes are validated and embedded, not only the node under the pointer.

Written by the indexing model from the issue text.