Refactor Cutout and Image Editing Logic

- Renamed "Base Plane Depth" to "Reference Depth" across validate_cutout.py for consistency.
- Introduced a new specification for Cutout mesh sampling to ensure source pixel spacing is preserved and limits are applied correctly.
- Unified naming conventions for image editing results to maintain consistency across Remove Background, Upscale, and Crop operations.
- Updated the handling of Refine Selection to ensure it retains the original bounds and does not apply unnecessary cropping.
- Enhanced material generation logic to connect image color directly to IOR Level, improving the rendering of dark areas.
- Established clear requirements for geometry depth controls and image result materials to ensure consistent behavior across different components.
- Removed outdated logic and ensured all changes are documented and tested for regression.

src/anyimage/operators/cutout_tool/object.py

@@ -156,7 +156,7 @@ def create_shape_object(
     context,
     source_object,
     shape,
-    mesh_resolution,
+    point_spacing,
     content_values,
     content_bounds,
     base_shape,
@@ -183,7 +183,7 @@ def create_shape_object(
     )
     world_metric, _world_z_scale = world_plane_metric(source_object.matrix_world)
     cleanup_value = cutout_cleanup_value(
-        cutout_sampling_spacing(source_object, mesh_resolution),
+        cutout_sampling_spacing(source_object, point_spacing),
         world_metric,
     )
     material = None
@@ -293,7 +293,7 @@ def create_shape_object(
             for name, value in (
                 ("Depth Scale", 1.0),
                 ("Uniform Scale", uniform_scale),
-                ("Base Plane Depth", depth_reference),
+                ("Reference Depth", depth_reference),
                 ("Depth Image", depth_image),
             ):
                 set_modifier_input(