doc: 为可扩展组件添加注释

pkg/provider/entities.py

@@ -23,14 +23,19 @@ class Message(pydantic.BaseModel):
     """消息"""
 
     role: str  # user, system, assistant, tool, command, plugin
+    """消息的角色"""
 
     name: typing.Optional[str] = None
+    """名称，仅函数调用返回时设置"""
 
     content: typing.Optional[str] = None
+    """内容"""
 
     function_call: typing.Optional[FunctionCall] = None
+    """函数调用，不再受支持，请使用tool_calls"""
 
     tool_calls: typing.Optional[list[ToolCall]] = None
+    """工具调用"""
 
     tool_call_id: typing.Optional[str] = None