Testing version of Sketcher DoF finder and redundant recognition improvement

Just a testing prerelease before merging.

There is a windows build, courtesy of sgrogran here:
https://github.com/sgrogan/FreeCAD/releases/tag/redundant

Below you can find an AppImage. It is my first so if you find issues, post:
https://forum.freecadweb.org/viewtopic.php?f=10&t=28370