Add model catalog with specifications for DA3 and MoGe-2 models

- Introduced ModelSpec dataclass to define model attributes.
- Added multiple models including DA3 Small, Base, Giant 1.1, Nested Giant Large 1.1, and MoGe-2 variants.
- Implemented functions to retrieve model details and metadata.
- Included BEN2 model specifications for background removal.

tests/test_moge_onnx.py

@@ -2,6 +2,7 @@ import importlib.util
 import sys
 import unittest
 from pathlib import Path
+from types import ModuleType
 from unittest.mock import patch
 
 import numpy as np
@@ -11,12 +12,17 @@ PROJECT_ROOT = Path(__file__).resolve().parents[1]
 
 
 def load_module():
+    snapform = ModuleType("snapform")
+    snapform.__path__ = [str(PROJECT_ROOT / "src" / "snapform")]
+    server = ModuleType("snapform.server")
+    server.__path__ = [str(PROJECT_ROOT / "src" / "snapform" / "server")]
     specification = importlib.util.spec_from_file_location(
-        "snapform_onnx_moge2",
+        "snapform.server.onnx_moge2",
         PROJECT_ROOT / "src" / "snapform" / "server" / "onnx_moge2.py",
     )
     module = importlib.util.module_from_spec(specification)
-    specification.loader.exec_module(module)
+    with patch.dict(sys.modules, {"snapform": snapform, "snapform.server": server}):
+        specification.loader.exec_module(module)
     return module