Add Circle - add option to set radius from origin to edge midpoint

<b>MORE COMPLETE PROPOSAL BY SERGE L: Add Inscribed, Circumscribed and Edge options</b>

Current behavior of blender allows only to set radius based on distance between origin and vertex. My proposal is to add another method that calculate radius based on distance between origin and edge midpoint. I found that useful in modeling geometry up to scale, for 3D printing.

• Create pocket for metric nut

I have just one use case for now, but I'm curious if that can be useful for any of YOU, in some other case.