Add StitchCut macro for sheet metal stitch cuts

[JohnHyslop]

This PR adds the StitchCut macro by John Hyslop.
It creates evenly spaced stitch cuts in sketches for hand-folded sheet metal parts.
Source repository: https://github.com/JohnHyslop/MyFreeCADMacros

[luzpaz]

Is there any benefit to adding this to the SheetMetal Workbench ?

[chennes]

Could you please add the relevant metadata for the Addon Manager as described here? Otherwise only the name of the macro will display.

[JohnHyslop]

Is there any benefit to adding this to the SheetMetal Workbench ?

Yes, I think it would be useful in the SheetMetal Workbench, as it directly supports hand-folding and creating precise cuts in sheet metal. It could also have broader applications, such as creating evenly spaced cuts for square or rectangular knockouts in panels. If the macro proves popular, it might make sense to include it officially, but it works well as a standalone macro for now.
Shaise’s workbench already has a perforation tab for folds and rectangular perforations, but most laser-cut parts I’ve worked with only require single line cuts. Perhaps an option could be added in that tab to incorporate this functionality as well.

[JohnHyslop]

Could you please add the relevant metadata for the Addon Manager as described here? Otherwise only the name of the macro will display.

Done, I hope I've filled this out correctly.