Add new functionality for image rectification and depth metadata handling

- Implemented a preview tool for rectifying images with interactive aspect controls in `preview.py`.
- Added tests for depth metadata loading to ensure consistent schema usage in `test_depth_metadata.py`.
- Developed comprehensive tests for cutout calibration processes in `test_cutout_calibration.py`, including stability checks and depth calibration.
- Created tests for frame compositing operations in `test_frame_compositing.py`, ensuring correct handling of depth and transparency.
- Introduced material slot inheritance functionality in `material_slots.py` to manage geometry material assignments.
- Built shared shader nodes for material processing in `shader.py`, including roughness and bump mapping setups.

tests/anyimage/operators/test_plane_operators.py

@@ -55,7 +55,6 @@ class PlaneOperatorsTest(BlenderTestCase):
                 patch.object(module.bpy, "ops", SimpleNamespace(anyimage=SimpleNamespace(generate_depth_plane=generate)), create=True),
             ):
                 self.assertEqual(operator_class.execute(operator, context), {"FINISHED"})
-            self.assertNotIn("depth_mode", generate.call_args.kwargs)
             self.assertEqual(generate.call_args.kwargs["source_object_name"], "Source")
             self.assertEqual(generate.call_args.kwargs["plane_type"], plane_type)