Add explicit type annotations to AST traversal paths

Updated the performance monitor Vite plugin to add explicit type annotations to AST traversal callback parameters, improving type safety and clarity. Also removed a duplicate import in src/plugin/index.ts.

src/plugin/index.ts

@@ -1,6 +1,5 @@
 import { NapCatOneBot11Adapter, OB11Message } from '@/onebot';
 import { ChatType, NapCatCore } from '@/core';
-import { ChatType, NapCatCore } from '@/core';
 import { ActionMap } from '@/onebot/action';
 import { OB11PluginAdapter } from '@/onebot/network/plugin';