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>

plugins/opencad-python/entity_manifest.json

@@ -40,7 +40,8 @@
     "Ole2Frame",
     "Solid3D",
     "Body",
-    "Region"
+    "Region",
+    "Surface"
   ],
   "manual_kinds": [
     "Dimension"
@@ -891,6 +892,40 @@
           "read_only": true
         }
       }
+    },
+    "Surface": {
+      "update_only": true,
+      "update_only_message": "Surface is built by the geometry kernel: use doc.solids.surface(profile) for a plane surface or doc.solids.extrude(open_profile, direction) for an extruded one; a script never writes the ACIS payload",
+      "fields": {
+        "acis_data": {
+          "exclude": true,
+          "_comment": "Opaque ACIS payload; never rewritten by a script."
+        },
+        "surface_data": {
+          "exclude": true,
+          "_comment": "Kind-specific sweep/loft parameters and embedded profiles; preserved untouched."
+        },
+        "wires": {
+          "exclude": true
+        },
+        "silhouettes": {
+          "exclude": true
+        },
+        "kind": {
+          "read_only": true,
+          "python_name": "surface_kind",
+          "_comment": "Renamed: a bare `kind` key names the entity type in every Python dict."
+        },
+        "modeler_format_version": {
+          "read_only": true
+        },
+        "point_of_reference": {
+          "read_only": true
+        },
+        "history_handle": {
+          "read_only": true
+        }
+      }
     }
   }
 }