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_clipboard_cache.py

@@ -23,7 +23,7 @@ def clipboard():
     bpy.ops.wm.read_factory_settings(use_empty=True)
 
 
-@pytest.mark.parametrize("edit", ["paint", "packed", "hidden_rgb", "size", "space", "alpha", "legacy", "unreadable"])
+@pytest.mark.parametrize("edit", ["paint", "packed", "hidden_rgb", "size", "space", "alpha", "unreadable"])
 def test_changed_cache_is_skipped_without_modifying_candidate(clipboard, edit, monkeypatch):
     original, reused = actions.acquire_packed_image(clipboard, ".png")
     expected = images.image_pixels(original)
@@ -41,8 +41,6 @@ def test_changed_cache_is_skipped_without_modifying_candidate(clipboard, edit, m
         original.colorspace_settings.name = "Non-Color"
     elif edit == "alpha":
         original.alpha_mode = "PREMUL"
-    elif edit == "legacy":
-        del original[actions.CLIPBOARD_CONTENT_PROPERTY]
     else:
         read = actions._clipboard_content_hash
         def fail_candidate(image):