feat: Introduce Balloon Lasso Tool for mesh extraction

- Added BalloonTool workspace tool to facilitate the extraction of balloon meshes in the 3D viewport.
- Implemented ActivateBalloonTool operator to activate the Balloon Lasso Tool.
- Refactored BalloonLasso operator into ExtractBalloon for better clarity and functionality.
- Enhanced properties for balloon extraction, including mode, thickness, resolution, and material reuse options.
- Updated SnapFormSettings to include new balloon-related properties.
- Improved material and image handling for balloon extraction, ensuring compatibility and reusability.
- Added tests to validate the registration and functionality of the new balloon tools and properties.

src/snapform/operators/__init__.py

@@ -1,5 +1,8 @@
 from .background import ProcessImageBackground, RemoveImageBackground
-from .balloon import BalloonLasso, ExtractBalloon
+from .balloon import (
+    ActivateBalloonTool,
+    ExtractBalloon,
+)
 from .debug import DebugBen2, DebugDa3, DebugMoge2
 from .depth_plane import (
     ConvertToDepthPlane,
@@ -27,7 +30,7 @@ CLASSES = (
     ExtractOriginalFrames,
     ClearModels,
     ExtractBalloon,
-    BalloonLasso,
+    ActivateBalloonTool,
     RemoveImageBackground,
     ConvertToDepthPlane,
     ConvertToSurface,