HTML模拟图例，点击事件可与折线图中的折线显隐联动

- [ ] I have searched the [issues](https://github.com/antvis/f2/issues) of this repository and believe that this is not a duplicate.

### What problem does this feature solve?
能否用html模拟图例，点击元素后，能与折现图中的折线进行联动

### What does the proposed API look like?
点击自定义的元素（html模拟图例），调用api或者方法，控制折线图中的折线显示或者隐藏

Start by reviewing F2's existing legend and line-chart APIs to determine how custom HTML elements could control series visibility. Define the public API or method for toggling a line from an external element, then verify that showing and hiding each line stays synchronized with the custom legend.

Written by the indexing model from the issue text.