Surface Sweep: sheets carried from open curves and profiles along a path (#843)

Surface Sweep carries open curves and closed profile boundaries along a sketch path into surface bodies, with smooth walls along curved point paths. Adds the SurfaceSweep feature (format 18 note), the surface.sweep command, a dialog with Edit Feature support, and kernel and engine tests.

Part of #757.

crates/doc/src/clipboard.rs

@@ -55,7 +55,7 @@ impl FeatureKind {
             | FeatureKind::SheetContour { sketch, .. }
             | FeatureKind::Rib { sketch, .. } => sk(sketch),
             FeatureKind::Patch { sketch: Some(s), .. } => sk(s),
-            FeatureKind::Sweep { sketch, path_sketch, .. } => {
+            FeatureKind::Sweep { sketch, path_sketch, .. } | FeatureKind::SurfaceSweep { sketch, path_sketch, .. } => {
                 sk(sketch);
                 sk(path_sketch);
             }