Smith Chart (scattersmith) pan & zoom functionality

This is a feature request for smith chart plotting. Smith chart plotting for impedance traces in RF electronic circuits is great in plotly. Here it is an example plot produced with such functionality:

Nevertheless, it lacks the basic pan & zoom capability that other plots have. In the case of smith chart:

Where, for other scatter plots, we have the tooling for pan & zoom:

I assume adding these same tools to this smithchart plotting might be reasonable.

首先，将现有的 scattersmith 绘图行为与其他散点图可用的平移和缩放工具进行比较。跟踪 Smith chart 的交互入口，并确定这些控件是如何启用的；完成的标准是 Smith charts 支持像可比较的散点图一样可用的平移和缩放交互。