Complete Surface: plane surfaces, extrusions, isolines and moves

Adds SurfaceFromProfile and Extrude kernel operations (doc.solids.surface and
doc.solids.extrude), accepts surfaces in Transform, and maps Surface with
editable isolines. Fixes a real bug found by the test: the surface kind field
overwrote the entity-type kind key in Python dicts, so it is exposed as
surface_kind, with a catalog test guarding against name collisions.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

crates/ocs_plugin_api/src/host.rs

@@ -90,6 +90,11 @@ pub enum SolidOperation {
     /// `layer`, or on the source's layer when `None`; `delete_source` erases
     /// the profile afterwards, as the REGION command does.
     RegionFromProfile { source: Handle, layer: Option<String>, delete_source: bool },
+    /// Build a plane surface from one closed planar profile entity.
+    SurfaceFromProfile { source: Handle, layer: Option<String>, delete_source: bool },
+    /// Extrude a planar profile along `direction`: a solid when the profile is
+    /// closed, a surface when it is open.
+    Extrude { source: Handle, direction: [f64; 3], layer: Option<String>, delete_source: bool },
 }
 
 /// Value of a host-managed drafting or document setting exposed to plugins.