chore(test): add `hanging-process` reporter on CI (#2622)

vitest.config.ts

@@ -1,10 +1,12 @@
 import { defineVitestConfig } from '@nuxt/test-utils/config'
+import { isCI } from 'std-env'
 
 export default defineVitestConfig({
   define: {
     'process.test': 'true',
   },
   test: {
+    reporters: isCI ? ['default', 'hanging-process'] : ['default'],
     setupFiles: [
       '/tests/setup.ts',
     ],