Migrating your app: Content v2 → v3

1. Upgrade @nuxt/content to ^3
2. Add content.config.ts collections
3. Replace queryContent with queryCollection
4. Replace dropped components (ContentDoc, etc.) with ContentRenderer
5. Keep TableOfContents usage; pass-in path is unchanged

- const page = await queryContent(route.path).findOne()
+ const page = await queryCollection('content').path(route.path).first()

Auto-fetch will pick fetch-v3 after the package major is 3.