refactor: 初步fileApi就绪

src/onebot/action/file/GetGroupFileCount.ts

@@ -17,6 +17,7 @@ export class GetGroupFileCount extends BaseAction<Payload, { count: number }> {
   actionName = ActionName.GetGroupFileCount;
   PayloadSchema = SchemaData;
   protected async _handle(payload: Payload) {
+    const NTQQGroupApi = this.CoreContext.getApiContext().GroupApi;
     const ret = await NTQQGroupApi.GetGroupFileCount([payload.group_id?.toString()]);
     return { count: ret.groupFileCounts[0] };
   }