Register surface.boundary, which the 2/3 squash left unregistered (#1701)

Thanks @midasdf.

crates/engine/src/cmd/mod.rs

@@ -74,6 +74,7 @@ mod sketch_modify;
 mod sketch_project;
 mod surface;
 mod surface_analysis;
+mod surface_boundary;
 mod surface_match;
 mod view_dxf;
 mod view_navigation;
@@ -236,6 +237,7 @@ pub fn command_specs() -> Vec<&'static CommandSpec> {
     v.extend(sketch_canvas::COMMANDS.iter());
     v.extend(sketch_3d::COMMANDS.iter());
     v.extend(surface_analysis::COMMANDS.iter());
+    v.extend(surface_boundary::COMMANDS.iter());
     v.extend(surface::COMMANDS.iter());
     v.extend(surface_match::COMMANDS.iter());
     v.extend(sketch_modify::COMMANDS.iter());