(papercut/wish) InsertPoint (SubD)

@Bright_Hope @xkdsofa
even if the workflow is on nurbs / polyline / Push-Pull

in terms of a more unified, consistent user experience I think it is important to have the same approaches / behaviour even if the technical surface (nurbs/subd/mesh/… voxel…sdf…) behind is different.
(that is why I always want a magic “glue” command - instead of join, weld, stitch, …)