style: enable import-x/no-duplicates (#6279)

packages/backend/server/tests/quota.spec.ts

@@ -1,7 +1,8 @@
 /// <reference types="../src/global.d.ts" />
 
 import { TestingModule } from '@nestjs/testing';
-import ava, { type TestFn } from 'ava';
+import type { TestFn } from 'ava';
+import ava from 'ava';
 
 import { AuthService } from '../src/core/auth';
 import {