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_cutout_fine_mesh.py

@@ -5,6 +5,7 @@ from scipy.sparse.csgraph import connected_components
 from scipy.spatial import cKDTree
 
 from anyimage.operators.cutout_tool import geometry as g
+from anyimage.operators.cutout_tool.balloon import poisson_balloon_profile
 from anyimage.operators.cutout_tool import fine_mesh as fine
 
 
@@ -42,7 +43,7 @@ def assert_supported(points, faces, boundary, components):
     ).tocsr()
     count, _labels = connected_components(graph[interior][:, interior], directed=False)
     assert count == len(components)
-    profile = g.poisson_balloon_profile(points, faces, boundary)
+    profile = poisson_balloon_profile(points, faces, boundary)
     assert np.isfinite(profile).all()
     assert np.all(profile[interior] > 0)