PATH: Bugfix/vcarve c++ exception

[mlampert]

This fixes the behaviour noted in https://forum.freecadweb.org/viewtopic.php?f=15&t=70208.
boost::polygon::voronoi generates some edges that don't make a lot of sense to process - I called them "borderline", for lack of a better name.

Also, "Voronoi" is now a module underneath "Path" and the object names are simplified accordingly ("Path.VoronoiEdge" -> "Path.Voronoi.Edge", ....)

[berndhahnebach]

for feature branch PR_7278. Pipeline 600698013 was triggered at 24a36f1. All CI branches and pipelines.

[berndhahnebach]

for feature branch PR_7278. Pipeline 600909127 was triggered at 234ecad. All CI branches and pipelines.

[berndhahnebach]

for feature branch PR_7278. Pipeline 603226260 was triggered at 3408d7c. All CI branches and pipelines.

[berndhahnebach]

for feature branch PR_7278. Pipeline 603400056 was triggered at 79a9b29. All CI branches and pipelines.

[donovaly]

Is this something to be backported to FC 0.20.1?

[sliptonic]

Yes

[donovaly]

Backported