Add image selection refinement functionality with BEN2 integration

- Implemented viewport.py for handling 3D view projections, gestures, and overlay drawing.
- Created refine_image_selection.py to manage the refinement of gesture masks and output image bounds.
- Added selection module with refine_selection.py to process and crop images based on alpha channel visibility.
- Introduced __init__.py for selection module to expose refine_selection function.

src/anyimage/operators/upscale.py

@@ -8,14 +8,14 @@ from ..server.media.resolution import (
     MIN_MAX_AI_INPUT_SIZE,
 )
 from ..runtime import JobOperatorBase
-from ..common.ai_job import (
+from ..common.ai import (
     require_input_path,
     invoke_ai_setup_if_needed,
     production_device,
     require_environment,
     require_model,
 )
-from ..common.image_data import (
+from ..common.image import (
     cleanup_image_input,
     default_extract_frames,
     is_image_empty,