Add new tests and functionality for image processing and geometry handling

- Introduced color_image.py for preparing standalone color images for tests.
- Added hdr_image.py to create HDR textures for testing.
- Implemented test_image_depth_panorama.py to evaluate panorama topology, UVs, and depth discontinuities.
- Created test_shadeless.py to validate the opacity and HDR color endpoints of the Shadeless group.
- Developed moge3_export.py for exporting dynamic MoGe-3 backbone and ONNX graphs.
- Added material.py to inherit material slots onto generated geometry.
- Built image_depth_panorama.py to construct a quad panorama with depth separation and sampling.

tests/anyimage/common/test_image_target.py

@@ -80,7 +80,7 @@ def test_invalid_node_context_does_not_fall_back_to_empty(texture, invalid):
         targets.ImageEditTarget.capture(context)
 
 
-@pytest.mark.parametrize("change", ["delete", "recreate", "rebind", "delete_material", "delete_image"])
+@pytest.mark.parametrize("change", ["delete", "recreate", "rebind", "delete_material", "delete_image", "identity"])
 def test_target_rejects_changed_identity_before_loading_result(texture, tmp_path, change):
     target = targets.ImageEditTarget.capture(texture_context(texture))
     tree = texture.id_data
@@ -95,6 +95,9 @@ def test_target_rejects_changed_identity_before_loading_result(texture, tmp_path
         texture.image = bpy.data.images.new("Replacement", width=2, height=2)
     elif change == "delete_material":
         bpy.data.materials.remove(bpy.data.materials["Texture material"])
+    elif change == "identity":
+        # A reused RNA address must not make a replacement node the original target.
+        texture["anyimage_identity"] = "replacement"
     else:
         bpy.data.images.remove(texture.image)
     count = len(bpy.data.images)