[Feature] 桑基图，如何绘制类别标签？有无示例代码

[zmm-test]

What problem does this feature solve?

如何绘制列表标签名称，

What does the proposed API look like?

增加桑基图类别标签的实例

[MU-ty]

可以添加多个VRender中的text元素实现 https://visactor.com/vrender/option/Text#attribute