折线图自定义插入标记线

- [ ] 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?
https://officalcms.upy.jiedaibao.com/2019/1022/20191022042715178.png
如这张图中所示，我想要在折线图中添加多个调仓记录线，并且调仓2个字是可点击的，应使用哪个api实现？
我尝试过使用自定义shape，但未成功

### What does the proposed API look like?
自定义shape，自定义 Interaction

Start by reviewing F2's custom shape and custom Interaction APIs, since those are the proposed approaches in the issue. Reproduce the line-chart scenario with multiple adjustment-record lines and clickable labels. Done would mean a documented or implemented API that supports both the markers and their click behavior.

Written by the indexing model from the issue text.