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/server/test_model_inference.py

@@ -12,7 +12,7 @@ from tests.anyimage.server.support import load_server_module, FakeModels
 class ModelInferenceTest(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
-        cls.moge2_model = load_server_module("models.moge2")
+        cls.moge2_model = load_server_module("models.moge")
 
         cls.upscale_model = load_server_module("models.upscale")