[Feature] 透视图表图例是否支持尺寸和颜色图例？

[zzsssssss]

What problem does this feature solve?

期望可以在透视图表中添加多组图例，图例不限于尺寸图例、颜色图例和离散图例。

What does the proposed API look like?

官网示例没找到颜色图例和尺寸图例的示例。