[Pie] - Pie plot v1

Pie plots are coming into demand and we should implement it.  This should implement a v1 of the pieplot, giving relevant project calls, a default color scale, and some important primary projector attributes.
i dont think "innerradius" or "outerradius" is appropriate. if we want to be typescript-like, then it should be "innerRadius". if we want to be css-like, then "inner-radius". "innerradius" is inconsistent with everything and harder to read