New '3D Donut' component

[jamesleesaunders]

Summary

Create new '3D Donut' d3-x3d reusable component.

Detail

The 3D Donut Chart may be a stand alone component which does not need an axis. Although Pie Charts have a bad reputation in the Data Viz community it may still be an interesting and fairly easy addition to d3-x3d? Example on Scott Logic blog post below.

Example

https://blog.scottlogic.com/2019/10/03/how-to-make-3d-charts-for-the-web-using-d3-and-x3dom.html