fix(vite): ignore virtual imports that aren't in vfs

[derz]

Avoids rollup error plugin load hook should return a string, a { code, map } object, or nothing/null when using (custom) virtual imports.

🔗 Linked issue

nuxt/nuxt#13921

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 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)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Check if the virtual module exist in nuxt and otherwise just ignore it (aka leave it up for the other loaders to handle that module). Avoids returning { code: null, map: null }.

Resolves nuxt/nuxt#13921

📝 Checklist

• I have linked an issue or discussion.
• [] n/a. I have updated the documentation accordingly.

[netlify]

✅ Deploy Preview for nuxt3-docs canceled.

Name	Link
🔨 Latest commit	94dde9c
🔍 Latest deploy log	https://app.netlify.com/sites/nuxt3-docs/deploys/627505d65720020008c5f5b7

[danielroe]

This seems like a good fix to me. Alternatively, we could change the prefix we're using here to virtual:nuxt or something.

[pi0]

@danielroe Can you please check failing CI?

[pi0]

Thanks @derz 💯