Loft point-and-click UI

[franknoirot]

Previous discussion here

TradCAD docs examples

1. AutoCAD
2. Onshape

Engine notes

Ready. First pass of lofts is ready in-engine. The only limitation is that to and from planes must be parallel with one another, which covers a large portion of lofting use cases.

API/KCL notes

Ready. There is an ergonomic loft standard library function available in KCL that simply accepts an array of sketches.

Point-and-click notes

1. The UX flow for this command, barring showing a preview before completing it, is simple. A new modeling machine command with two arguments should be added:
   1. from: a selection argument for a sketch. This should ideally allow for sketch region selection, but should not be blocked by that
   2. to: another selection argument for a sketch.
2. Ideally, the command should warn the user if their Loft does not meet the restriction of parallel sketches.
3. This doesn't block the loft user flow directly, but a user will not be able to complete the prerequisites of the Loft flow until Show offsetPlanes as selectable planes in the scene #4468 is completed, because you really need an offset plane to define the second sketch needed to complete a loft operation.