Add geometry nodes asset and validation script

- Implemented a new geometry nodes asset in `build_geometry_nodes_asset.py` to handle mesh refinement and topology fixing.
- Created a validation script in `validate_geometry_nodes_asset.py` to ensure the integrity and functionality of the geometry node group.
- Added input handling for various parameters including resolution, iterations, and smoothing options.
- Included checks for node group structure and attributes to validate the geometry processing pipeline.

tests/test_image_depth.py

@@ -21,7 +21,7 @@ def load_image_depth():
         IntProperty=lambda **options: options,
         StringProperty=lambda **options: options,
     )
-    fake_bpy.types = SimpleNamespace(Operator=object)
+    fake_bpy.types = SimpleNamespace(Menu=object, Operator=object)
     fake_bpy.path = SimpleNamespace(abspath=lambda path: path)
     with patch.dict(sys.modules, {"bpy": fake_bpy}):
         specification = importlib.util.spec_from_file_location(