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.

src/anyimage/operators/cutout_tool/__init__.py

@@ -1,4 +1,4 @@
-from .main import CutoutSelectionToShape, CutoutTool, SelectCutoutSelection
+from .operators import CutoutSelectionToShape, CutoutTool, SelectCutoutSelection
 
 __all__ = (
     "CutoutSelectionToShape",

src/anyimage/operators/cutout_tool/geometry.py

@@ -874,9 +874,6 @@ def teddy_balloon_heights(
     )
 
 
-DEFAULT_ALGORITHM = "POISSON"
-
-
 def cotangent_poisson_field(
     planar_points,
     planar_faces,