Refactor Cutout Tool to Use World Space Edge Length

- Replaced the Mesh Detail parameter with a new Edge Length property to define cutout sampling in physical units.
- Introduced Minimum Relative Edge Length preference to control effective spacing based on the bounding box of the cutout content.
- Updated tests to validate the new edge length functionality and ensure consistent behavior across different resolutions and canvas sizes.
- Removed deprecated parameters and adjusted related properties to align with the new edge length implementation.
- Enhanced geometry sampling logic to utilize effective world spacing for both standard and fine outline modes.

tests/anyimage/test_preferences.py

@@ -132,24 +132,16 @@ class PreferencesTest(BlenderTestCase):
         )
 
 
-    def test_cutout_mesh_resolution_defaults_and_clamps_independently(self):
-        preference_module = self.anyimage.preferences
+    def test_cutout_relative_edge_length_defaults_and_clamps(self):
+        module = self.anyimage.preferences
         preferences = self.fake_bpy.context.preferences.addons["anyimage"].preferences
-
-        self.assertEqual(
-            preference_module.configured_max_cutout_mesh_resolution(),
-            1024,
-        )
-        preferences.max_cutout_mesh_resolution = 2048
-        self.assertEqual(
-            preference_module.configured_max_cutout_mesh_resolution(),
-            1024,
-        )
-        preferences.max_cutout_mesh_resolution = 1
-        self.assertEqual(
-            preference_module.configured_max_cutout_mesh_resolution(),
-            4,
-        )
+        self.assertEqual(module.configured_min_cutout_relative_edge_length(), 0.01)
+        preferences.min_cutout_relative_edge_length = 2
+        self.assertEqual(module.configured_min_cutout_relative_edge_length(), 0.02)
+        preferences.min_cutout_relative_edge_length = 200
+        self.assertEqual(module.configured_min_cutout_relative_edge_length(), 1)
+        preferences.min_cutout_relative_edge_length = 0
+        self.assertAlmostEqual(module.configured_min_cutout_relative_edge_length(), 0.00001)
 
 
     def test_frame_resolution_defaults_and_clamps_independently(self):