FreeCAD's Robot arm example support

[martinRenou]

Currently, we are not able to display the robot arm from the FreeCAD example. We should see if that can be fixed.

[luzpaz]

Heads up: https://github.com/alexneufeld/freecad_robot_python (will be replacing the FreeCAD Robot Workbench)

[luzpaz]

Upstream has the issue as well and is considering removing it for the 1.0 release until it can be fixed
FreeCAD/FreeCAD#17303