🙏列表单元格的边框样式

### Describe the feature / 功能描述

1）目前边框只支持直线和虚线，能否提供更多的选择或者自定义途径。
2）设置边框直线或者虚线时，需要同时对水平和垂直边框设置，能否支持单独设置。

### Design the API / API 设计

| name | type | default | description |
| ---- | ---- | ------- | ----------- |
| - | - | - | - |

### Are you willing to contribute? / 是否愿意参与贡献？

✅ Yes / 是

The issue names no files, tests, or entry points, so begin by locating the border-style API and its tests. Done means the agreed API supports additional or custom styles and allows horizontal and vertical borders to be configured independently, with tests covering both behaviors.

Written by the indexing model from the issue text.