Add comprehensive tests for cutout and mesh functionalities

- Introduced `test_cutout.py` to validate cutout pie menu behavior, image lasso options, and mesh detail calculations.
- Added `test_mesh.py` to ensure correct tangent normal rasterization, plane source topology, and depth surface evaluations.
- Created `test_mesh_blender.py` to verify material node groups, tangent baking, and local cutout building from Blender images.
- Implemented tests for handling alpha regions and ensuring geometry nodes maintain expected behavior.

src/anyimage/operators/__init__.py

@@ -1,17 +1,12 @@
 from .background import ProcessImageBackground, RemoveImageBackground
-from .balloon import (
-    ActivateBalloonTool,
-    ExtractBalloon,
-    AnalyzeBalloon,
-)
+from .cutout import ActivateCutoutTool, SelectCutoutRegion
 from .debug import DebugBen2, DebugDa3, DebugMoge2, DebugUpscale
 from .image_edit import CLASSES as IMAGE_EDIT_CLASSES
-from .depth_plane import (
+from .mesh import (
+    ConvertCutoutShape,
     ConvertToDepthPlane,
-    ExtractOriginalFrames,
-    GenerateDa3Depth,
-    GenerateMoge2Depth,
-    GenerateOriginalBackground,
+    ConvertToPlane,
+    GenerateMesh,
 )
 from .models import (
     ClearModels,
@@ -20,8 +15,6 @@ from .models import (
     OpenAIEnvironmentSettings,
     SetupAIEnvironment,
 )
-from .mesh_plane import ConvertToMeshPlane
-from .surface import ConvertToSurface, GenerateDa3Surface, GenerateMoge2Surface
 from .upscale import UpscaleImage
 
 
@@ -34,21 +27,15 @@ CLASSES = (
     DebugMoge2,
     DebugBen2,
     DebugUpscale,
-    GenerateDa3Depth,
-    GenerateMoge2Depth,
-    GenerateDa3Surface,
-    GenerateMoge2Surface,
+    GenerateMesh,
+    SelectCutoutRegion,
+    ConvertCutoutShape,
+    ActivateCutoutTool,
     ProcessImageBackground,
-    GenerateOriginalBackground,
-    ExtractOriginalFrames,
     ClearModels,
     *IMAGE_EDIT_CLASSES,
-    ExtractBalloon,
-    AnalyzeBalloon,
-    ActivateBalloonTool,
     RemoveImageBackground,
     UpscaleImage,
-    ConvertToMeshPlane,
+    ConvertToPlane,
     ConvertToDepthPlane,
-    ConvertToSurface,
 )