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_upscale_undo.py

@@ -19,12 +19,12 @@ def test_upscale_result_replacement_undo_restores_source(tmp_path):
     bpy.context.scene.collection.objects.link(owner)
     owner_name, source_name = owner.name, source.name
     before = image_pixels(source)
-    Image.new("RGBA", (16,16), (32,64,96,128)).save(tmp_path / "upscale.0001.png")
+    Image.new("RGBA", (16,16), (32,64,96,128)).save(tmp_path / "upscale.png")
 
     def execute(operator, context):
         operator._image_target = ImageEditTarget.capture(SimpleNamespace(object=owner))
         operator.model = "HAT_GAN_X4_SHARPER"
-        operator.response(context, SimpleNamespace(directory=tmp_path))
+        operator.response(context, SimpleNamespace(file=lambda key: tmp_path / f"{key}.png"))
         return {"FINISHED"}
 
     bpy.context.preferences.edit.use_global_undo = True