fix: ignore root when prerendering using strategy: 'prefix'

[BobbieGoede]

🔗 Linked issue

• No match found for location with path "/" #2855
• Related Strategy prefix with detectBrowserLanguage not redirecting correctly on root in Static Site Generation #2790

❓ Type of change

• 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Resolves #2855

Not sure how to test this exactly 🤔

These changes removes/ignores the / entry route added by nitro during prerendering and adds localized entry pages to use instead. This also excludes the / route from the generated build, which I think is/was the original behavior when running generate with strategy prefix (currently without these changes this throws an error).

When not prerendering we re-add the index page (not localized) so that requests on root can be redirected.

📝 Checklist

• I have linked an issue or discussion.
• I have added tests (if possible).
• I have updated the documentation accordingly.

[kazupon]

Thanks!
LGTM!