Add easy way to draw circle arcs

[murl-digital]

This PR is related to the discussion in #4188, however it doesn't resolve the issue. It does, however, add a way to draw arcs on a circle. A couple things which need discussion:

• AngleIter can, in it's current state, loop infinitely. I'm not sure what the best way to handle this is.
• Using this method, it can sometimes be difficult to get the arc to behave the way you want. For example, drawing a track for a dial requires you to rather unintuitively provide a start and end angle of 225 and -45.
• The documentation could use some better wording, but I'm not sure how best to communicate its quirks.

[YgorSouza]

Looks like there might be some conflict between this and #4424.

[murl-digital]

Looks like there might be some conflict between this and #4424.

yep, closing mine in favor of this