feat: 全面改用maim_message，移除对rest的支持

src/plugins/PFC/observation_info.py

@@ -1,7 +1,7 @@
 # Programmable Friendly Conversationalist
 # Prefrontal cortex
 from typing import List, Optional, Dict, Any, Set
-from ..message.message_base import UserInfo
+from maim_message import UserInfo
 import time
 from dataclasses import dataclass, field
 from src.common.logger import get_module_logger