Refactor geometry generation to standardize Blender object coordinates

- Unified the canonical local frame for generated geometries (Plane, Depth Plane, Relief Plane, Cutout, Depth Cutout) to align with Blender's object coordinate system, setting X as horizontal, Z as up, and +Y as depth.
- Removed the `Depth Axis` parameter from `O Image Cutout` and `O Image Depth Cutout`, simplifying the geometry generation process.
- Updated the depth direction defaults to use +Y instead of -Z for `O Image Relief Plane` and Depth Symmetry.
- Adjusted the geometry nodes to ensure thickness, projection, and shell displacements operate along the Y-axis.
- Implemented new capabilities for handling object space normals to align with the new canonical frame.
- Enhanced the Depth Symmetry functionality to mirror across the canonical Y-axis and perform a final rotation to maintain the correct orientation.
- Added tests to validate the new coordinate system and ensure compatibility with existing assets.

tests/anyimage/operators/test_cutout_geometry.py

@@ -211,7 +211,7 @@ def test_cutout_domain_centers_vertices_on_crop_bounds():
 
     center = (vertices[:, :2].min(axis=0) + vertices[:, :2].max(axis=0)) * 0.5
     assert np.allclose(center, 0.0, atol=1e-6)
-    expected_uv = vertices[:, :2] / np.asarray((4.0, 4.0)) + 0.5
+    expected_uv = vertices[:, [0, 2]] / np.asarray((4.0, 4.0)) + 0.5
     assert np.allclose(uv, expected_uv, atol=1e-6)