Refactor anti-injection system into modular subpackages

Split the anti-prompt-injector module into core, processors, management, and decision submodules for better maintainability and separation of concerns. Moved and refactored detection, shielding, statistics, user ban, message processing, and counter-attack logic into dedicated files. Updated imports and initialization in __init__.py and anti_injector.py to use the new structure. No functional changes to detection logic, but code organization is significantly improved.

src/chat/message_receive/bot.py

@@ -20,7 +20,7 @@ from src.plugin_system.apis import send_api
 
 # 导入反注入系统
 from src.chat.antipromptinjector import get_anti_injector, initialize_anti_injector
-from src.chat.antipromptinjector.config import ProcessResult
+from src.chat.antipromptinjector.types import ProcessResult
 
 # 定义日志配置