Refactor and clean up codebase by removing unused functions and reorganizing imports

- Removed unused model keys and functions from properties.py.
- Deleted projection.py as its functions were no longer needed.
- Cleaned up model_catalog.py by removing unused model directory function.
- Updated imports in various test files to reflect new module structure.
- Removed deprecated test cases related to image editing tools.
- Added new tests for ONNX runtime provider selection logic.

tests/test_model_onnx_runtime.py

@@ -190,5 +190,27 @@ class OnnxRuntimeTest(unittest.TestCase):
         )
 
 
+    def test_auto_provider_prefers_accelerated_runtime(self):
+        providers = onnx_runtime.select_providers(
+            "auto",
+            ["CPUExecutionProvider", "DmlExecutionProvider"],
+        )
+
+        self.assertEqual(
+            providers,
+            ["DmlExecutionProvider", "CPUExecutionProvider"],
+        )
+
+
+    def test_explicit_unavailable_provider_falls_back_to_cpu(self):
+        providers = onnx_runtime.select_providers(
+            "cuda",
+            ["CPUExecutionProvider"],
+        )
+
+        self.assertEqual(providers, ["CPUExecutionProvider"])
+
+
+
 if __name__ == "__main__":
     unittest.main()