dont add exception handler for empty commands

src/providers/koishi-metascan.service.ts

@@ -17,7 +17,7 @@ import { KoishiContextService } from './koishi-context.service';
 import { Module } from '@nestjs/core/injector/module';
 import { KoishiMetadataFetcherService } from '../koishi-metadata-fetcher/koishi-metadata-fetcher.service';
 import { KoishiInterceptorManagerService } from '../koishi-interceptor-manager/koishi-interceptor-manager.service';
-import { Registrar } from 'koishi-decorators';
+import { CommandRegisterConfig, Registrar } from 'koishi-decorators';
 import { handleActionException } from '../utility/wrap-action';
 import { KoishiExceptionHandlerService } from '../koishi-exception-handler/koishi-exception-handler.service';
 
@@ -60,6 +60,7 @@ export class KoishiMetascanService {
         ),
       );
       this.addInterceptors(command, interceptorDefs);
+      if (!(result.data as CommandRegisterConfig).config?.empty) {
         command.action(async (argv) => {
           try {
             return await argv.next();
@@ -69,6 +70,7 @@ export class KoishiMetascanService {
         }, true);
       }
     }
+  }
 
   private registerOnService(
     ctx: Context,