The API of this implementation mimics unity's API for the same feature,
c.f.

https://docs.unity3d.com/ScriptReference/Handles.DrawWireArc.html

This was done since it seems to be the most flexible design so far
allowing for arcs with arc angles in the range of [-360.0, 360.0]
degrees.

Authored-by: RobWalt <robwalter96@gmail.com>

I noticed some flaws with the original implementation of the API while
creating some examples:

- The orientation via `from` and `rotation_axis` fields felt really
  wonky
- The rotation seemed not to rotate around the center set by the user

This is why I reimplemented the API. It now draws some kind of default
arc in 3D which has properties which are documented in the doc strings.
You can modify this default arc via builder methods which seems to be
the most flexible approach in my eyes.

Authored-by: RobWalt <robwalter96@gmail.com>

Authored-by: RobWalt <robwalter96@gmail.com>

- reuse new factored out function to calculate the default amount of
  segments for arc2d
- add the gizmos active check to arc3d
- also implement optional segments logic for arc3d
- cleanup debug gizmo center drawing

Authored-by: RobWalt <robwalter96@gmail.com>

Authored-by: RobWalt <robwalter96@gmail.com>

Thanks for spotting this Alice!

Authored-by: RobWalt <robwalter96@gmail.com>

and also adjust:

- docs
- tests
- examples

Authored-by: RobWalt <robwalter96@gmail.com>