style: refactor the style of app exports.ts

src/client/app/exports.ts

@@ -1,6 +1,8 @@
 // exports in this file are exposed to themes and md files via 'vitepress'
 // so the user can do `import { useRoute, useSiteData } from 'vitepress'`.
 
+import { ComponentOptions } from 'vue'
+
 // generic types
 export type { SiteData, PageData } from '/@types/shared'
 
@@ -17,6 +19,7 @@ export { usePageData } from './composables/pageData'
 export { Content } from './components/Content'
 
 import _Debug from './components/Debug.vue'
-import { ComponentOptions } from 'vue'
+
 const Debug = _Debug as ComponentOptions
+
 export { Debug }