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.

src/anyimage/menu.py

@@ -27,6 +27,11 @@ class AnyImageImageMenu(bpy.types.Menu):
             text="Convert to Relief Plane",
             icon="MOD_DISPLACE",
         )
+        layout.operator(
+            "anyimage.convert_to_panorama",
+            text="Convert to Panorama",
+            icon="SPHERE",
+        )
         layout.separator()
         draw_image_actions(layout, context)