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_alpha_presentation.py

@@ -191,8 +191,8 @@ def test_isolated_decode_failure_releases_copy():
 
 def test_mask_pack_reopen_add_and_repeat_frame_preserve_hidden_color(tmp_path):
     from anyimage.common.selection import SelectionMask
-    from anyimage.operators.image_edit_tool.mask import apply_alpha_mask
-    from anyimage.operators.image_edit_tool import frame
+    from anyimage.operators.mask_tool import apply_alpha_mask
+    from anyimage.operators import frame_tool as frame
 
     source = bpy.data.images.new("Roundtrip source", width=2, height=2, alpha=True)
     rgba = np.tile(np.array([0.2, 0.4, 0.8, 1], dtype=np.float32), (2, 2, 1))