Add image extraction functionality with background removal

- Implemented ExtractImageRegion operator for extracting image regions using box or lasso selection.
- Added RemoveImageRegionBackground job for background removal from selected image regions.
- Created utility functions for polygon bounds, selection canvas creation, and applying selection masks.
- Integrated image processing using PIL and numpy for efficient pixel manipulation.
- Enhanced user experience with modal drawing and status updates during extraction.

src/anyimage/operators/__init__.py

@@ -5,11 +5,7 @@ from .balloon import (
     AnalyzeBalloon,
 )
 from .debug import DebugBen2, DebugDa3, DebugMoge2
-from .image_lasso import (
-    ActivateImageLassoTool,
-    AnalyzeImageLasso,
-    ExtractImageLasso,
-)
+from .image_extract import CLASSES as IMAGE_EXTRACT_CLASSES
 from .depth_plane import (
     ConvertToDepthPlane,
     ExtractOriginalFrames,
@@ -44,9 +40,7 @@ CLASSES = (
     GenerateOriginalBackground,
     ExtractOriginalFrames,
     ClearModels,
-    ExtractImageLasso,
-    AnalyzeImageLasso,
-    ActivateImageLassoTool,
+    *IMAGE_EXTRACT_CLASSES,
     ExtractBalloon,
     AnalyzeBalloon,
     ActivateBalloonTool,