* Part: Fix orientation of internal shells of a solid
If a solid consists of multiple shells then it can happen that the
internal shells have incorrect orientation that leads to a broken solid.
This fixes issue https://github.com/FreeCAD/FreeCAD/issues/24994
* Part: Add method Feature::fixSolids
This method explicitly checks for solids with the error
'BRepCheck_EnclosedRegion' that means that internal shells of a solid
are wrong.
Using ShapeFix_Solid fixes the solid.
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Co-authored-by: wwmayer <wmayer@freecad.org>
c6ede8614f