[Feat]: 增加漏斗图的连接线demo

### Describe the feature / 功能描述

<img width="1678" height="1494" alt="Image" src="https://github.com/user-attachments/assets/d7d86cf5-15dd-4b75-8402-d127597a2ee2" />

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

Please select / 请选择