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/__init__.py

@@ -6,7 +6,7 @@ from .clipboard_image import CLASSES as CLIPBOARD_CLASSES
 from .runtime import runtime
 from .operators import CLASSES as OPERATOR_CLASSES
 from .operators.balloon import BalloonTool
-from .operators.image_lasso import ImageBoxTool, ImageLassoTool
+from .operators.image_extract import ImageBoxTool, ImageLassoTool, ImagePerspectiveTool
 from .preferences import AnyImagePreferences
 from .properties import AnyImageSettings
 from .menu import AnyImageImageMenu, draw_image_context_menu
@@ -46,6 +46,11 @@ def register():
         after={ImageBoxTool.bl_idname},
         separator=False,
     )
+    bpy.utils.register_tool(
+        ImagePerspectiveTool,
+        after={ImageLassoTool.bl_idname},
+        separator=False,
+    )
     bpy.utils.register_tool(BalloonTool, separator=False)
     bpy.types.Scene.anyimage_settings = bpy.props.PointerProperty(
         type=AnyImageSettings,
@@ -60,6 +65,7 @@ def unregister():
     runtime.unregister()
     clipboard_image.unregister_keymaps()
     bpy.utils.unregister_tool(BalloonTool)
+    bpy.utils.unregister_tool(ImagePerspectiveTool)
     bpy.utils.unregister_tool(ImageLassoTool)
     bpy.utils.unregister_tool(ImageBoxTool)
     bpy.types.VIEW3D_MT_object_context_menu.remove(draw_image_context_menu)