Quote selection of itemized or enumerated lists with additional spaces

Quote replying to a list adds 4 extra spaces in front of list items. That then gets rendered as code blocks in Markdown, e.g. take following lists

* item1
* item2

1. enum1
2. enum2

And see comment [below](https://github.com/github/quote-selection/issues/62#issuecomment-3022686016).

未指定源文件或测试。首先复现 issue 中描述的列表引用行为，并查看链接的评论以了解详情；当被引用的项目列表和编号列表不再多出四个空格，也不再渲染为 Markdown 代码块时，即视为完成。

由索引模型根据 Issue 内容生成。