add @Property to get_experiment_setting

rdagent/core/scenario.py

@@ -36,6 +36,7 @@ def rich_style_description(self) -> str:
     def get_scenario_all_desc(self) -> str:
         """Combine all the description together"""
 
+    @property
     @abstractmethod
     def get_experiment_setting(self) -> str:
         """Get experiment setting and return as rich text string"""