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.

tools/nodes/common/cutout_boundary.py

@@ -36,8 +36,8 @@ def taper_split_profile(group, original, geometry):
     rim = evaluate_field(group, edge_boundary_field(nodes, links), "FLOAT", "POINT")
     protected = sample_field(group, original, rim, "FLOAT", index=nearest.outputs["Index"])
     influence = boundary_influence(group, protected)
-    controls = group_input(nodes, {"Split Threshold"})
-    band = _math(group, "MULTIPLY", influence, _math(group, "GREATER_THAN", controls.outputs["Split Threshold"], 0))
+    controls = group_input(nodes, {"Depth Split"})
+    band = _math(group, "MULTIPLY", influence, _math(group, "GREATER_THAN", controls.outputs["Depth Split"], 0))
     retained = _math(group, "SQRT", _math(group, "MAXIMUM", _math(group, "SUBTRACT", 1, band), 0))
     profile = _math(group, "MULTIPLY", read_float_attribute(group, "o_balloon"), retained)
     return store_float_attribute(group, geometry, "o_balloon", profile)