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_image_menu.py

@@ -93,27 +93,6 @@ class ImageMenuTest(BlenderTestCase):
         self.assertNotIn(("anyimage.setup_ai_environment", True), calls)
 
 
-    def test_image_edit_activation_defaults_to_frame(self):
-        calls = []
-        previous_ops = getattr(self.fake_bpy, "ops", None)
-        self.fake_bpy.ops = SimpleNamespace(
-            wm=SimpleNamespace(
-                tool_set_by_id=lambda **options: calls.append(options) or {"FINISHED"}
-            )
-        )
-        try:
-            result = self.image_frame.ActivateImageEditTool().execute(None)
-        finally:
-            if previous_ops is None:
-                del self.fake_bpy.ops
-            else:
-                self.fake_bpy.ops = previous_ops
-
-        self.assertEqual(result, {"FINISHED"})
-        self.assertEqual(
-            calls,
-            [{"name": "anyimage.frame", "space_type": "VIEW_3D"}],
-        )
 
 
     def test_image_operators_stay_clickable_until_server_is_busy(self):