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_data.py

@@ -217,13 +217,6 @@ class ImageDataTest(unittest.TestCase):
         )
 
 
-    def test_color_name_strips_video_extension(self):
-        source_object = SimpleNamespace(data=SimpleNamespace(name="clip.mp4"))
-
-        self.assertEqual(
-            self.modules.image.color_data_name(source_object),
-            "clip_color.png",
-        )
 
 
     def test_force_sequence_source_keeps_loaded_sequence(self):
@@ -322,20 +315,6 @@ class ImageDataTest(unittest.TestCase):
         )
 
 
-    def test_color_name_uses_source_image_base_name(self):
-        source_object = SimpleNamespace(
-            data=SimpleNamespace(name="img.png"),
-        )
-
-        self.assertEqual(
-            self.modules.image.color_data_name(source_object),
-            "img_color.png",
-        )
-        source_object.data.name = "img.png.001"
-        self.assertEqual(
-            self.modules.image.color_data_name(source_object),
-            "img.001_color.png",
-        )
 
 
     def test_image_empty_bounds_keep_image_aspect_and_empty_offset(self):