Python: docs(typing): add return type and docstring to store_results in utils/chat.py

python/semantic_kernel/utils/chat.py

@@ -8,8 +8,18 @@
     from semantic_kernel.contents.chat_message_content import ChatMessageContent
 
 
-def store_results(chat_history: ChatHistory, results: list["ChatMessageContent"]):
-    """Stores specific results in the context and chat prompt."""
+def store_results(
+        chat_history: ChatHistory, 
+        results: list["ChatMessageContent"]) -> ChatHistory:
+    """Stores specific results in the context and chat prompt.
+
+    Args:
+        chat_history(ChatHistory): The current chat history instance.
+        results(list["ChatMessageContent"]): Messages to be stored in the history.
+
+    Returns:
+        ChatHistory: Updated chat history containing the new messages.
+    """
     for message in results:
         chat_history.add_message(message=message)
     return chat_history