enhance: STaR Integration

camel/agents/chat_agent.py

@@ -573,9 +573,8 @@ def step(
             self.model_backend.model_config_dict.get("response_format")
             and response_format
         ):
-            raise ValueError(
-                "The `response_format` parameter cannot be set both in "
-                "the model configuration and in the ChatAgent step."
+            logger.warning(
+                f"Overriding the response format with {response_format}."
             )
 
         self.original_model_dict = self.model_backend.model_config_dict

camel/datagen/__init__.py

@@ -14,8 +14,10 @@
 
 from .cotdatagen import CoTDataGenerator
 from .self_instruct import SelfInstructPipeline
+from .star import STaRPipeline
 
 __all__ = [
     "CoTDataGenerator",
     "SelfInstructPipeline",
+    "STaRPipeline",
 ]