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/support/depth_surface.py

@@ -65,7 +65,7 @@ def surface(*, step=6.0, size=1.0, resolution=2, wrapper=False):
         ("Depth Scale", 1.0),
         ("Thickness", 0.0),
         ("Front Inflation", 0.0),
-        ("Split Threshold", 0.0),
+        ("Depth Split", 0.0),
         ("Mode", 1),
         ("Smooth", 0),
         ("Boundary Smooth", 0),
@@ -73,7 +73,7 @@ def surface(*, step=6.0, size=1.0, resolution=2, wrapper=False):
         set_value(name, value)
     if wrapper:
         set_value("Cleanup Threshold", 0.0)
-        set_value("Inward Axis", 0)
+        set_value("Depth Axis", 0)
         set_value("Smooth", 0)
     return obj, set_value