Add comprehensive tests for edge depth extension, empty image edits, and material view adaptation

- Introduced `test_edge_depth.py` to validate the functionality of edge depth extension, ensuring core alpha preservation, proper depth handling, and edge padding behavior.
- Created `test_empty_image_edits.py` to verify the behavior of image edits in Blender, focusing on shared edits, preservation of image properties, and handling of failed operations.
- Developed `test_material_view_adaptation.py` to test material adaptation preferences, ensuring color space and alpha settings are correctly applied and preserved across various scenarios.

src/anyimage/operators/cutout_tool/interaction.py

@@ -32,6 +32,8 @@ def _pie_button(
     generate_normal,
     point_spacing,
     inward_axis,
+    alpha_threshold,
+    fine_outline,
 ):
     operator = pie.operator(
         "anyimage.cutout_selection_to_shape",
@@ -44,6 +46,8 @@ def _pie_button(
     operator.generate_normal = generate_normal
     operator.point_spacing = point_spacing
     operator.inward_axis = inward_axis
+    operator.alpha_threshold = alpha_threshold
+    operator.fine_outline = fine_outline
 
 
 def open_shape_pie(
@@ -61,6 +65,8 @@ def open_shape_pie(
         getattr(settings, "cutout_generate_normal", False)
     )
     inward_axis = str(getattr(settings, "cutout_inward_axis", "NEGATIVE_Z"))
+    alpha_threshold = settings.cutout_alpha_threshold
+    fine_outline = settings.cutout_fine_outline
 
     def draw(menu, _context):
         pie = menu.layout.menu_pie()
@@ -76,6 +82,8 @@ def open_shape_pie(
                 generate_normal,
                 point_spacing,
                 inward_axis,
+                alpha_threshold,
+                fine_outline,
             )
 
     context.window_manager.popup_menu_pie(