Add get_angle_snap_value() helper to tool/snap.py

This function retrieves the angle snap increment from Blender's
tool_settings.snap_angle_increment property, which was added in
Blender 4.2. This allows users to configure the angle snap value
through Blender's native UI instead of using hardcoded values.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/bonsai/bonsai/tool/snap.py

@@ -114,6 +114,15 @@ class Snap(bonsai.core.tool.Snap):
 
         return increment
 
+    @classmethod
+    def get_angle_snap_value(cls, context: bpy.types.Context) -> float:
+        """Get the angle snap increment from Blender's tool settings.
+
+        :param context: Blender context
+        :return: Angle snap increment in degrees
+        """
+        return context.scene.tool_settings.snap_angle_increment
+
     @classmethod
     def get_snap_points_on_raycasted_face(cls, context, event, obj, face_index):
         matrix = obj.matrix_world.copy()