return empty array instead of filenotfounderror (#64)

Author: nabinchha

src/data_designer/config/default_model_settings.py

@@ -75,7 +75,7 @@ def get_default_model_configs() -> list[ModelConfig]:
         config_dict = load_config_file(MODEL_CONFIGS_FILE_PATH)
         if "model_configs" in config_dict:
             return [ModelConfig.model_validate(mc) for mc in config_dict["model_configs"]]
-    raise FileNotFoundError(f"Default model configs file not found at {str(MODEL_CONFIGS_FILE_PATH)!r}")
+    return []
 
 
 def get_default_providers() -> list[ModelProvider]:

tests/config/test_default_model_settings.py

@@ -79,8 +79,7 @@ def test_get_default_model_configs_path_exists(tmp_path: Path):
 
 def test_get_default_model_configs_path_does_not_exist():
     with patch("data_designer.config.default_model_settings.MODEL_CONFIGS_FILE_PATH", new=Path("non_existent_path")):
-        with pytest.raises(FileNotFoundError, match=r"Default model configs file not found at 'non_existent_path'"):
-            get_default_model_configs()
+        assert get_default_model_configs() == []
 
 
 def test_get_default_providers_path_exists(tmp_path: Path):