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_media_input.py

@@ -103,22 +103,6 @@ class MediaInputTest(unittest.TestCase):
         self.assertIsNone(temporary_directory)
 
 
-    def test_copy_color_images_numbers_a_still_image(self):
-        with tempfile.TemporaryDirectory() as directory:
-            root = Path(directory)
-            source = root / "source.png"
-            source.write_bytes(b"frame")
-            output = root / "result"
-            output.mkdir()
-
-            self.media.copy_color_images([source], output)
-
-            self.assertEqual(
-                (output / "image.0001.png").read_bytes(),
-                b"frame",
-            )
-
-
     def test_extract_video_frames_reads_frames_sequentially(self):
         with tempfile.TemporaryDirectory() as directory:
             root = Path(directory)
@@ -179,5 +163,5 @@ class MediaInputTest(unittest.TestCase):
             input_path = Path(directory) / "input.txt"
             input_path.touch()
 
-            with self.assertRaisesRegex(RuntimeError, "Unsupported input type"):
+            with self.assertRaisesRegex(RuntimeError, "Unsupported input format: .txt"):
                 self.media.prepare_input(input_path, 16, directory)