fix(nuxt): add `build.transpile` strings to nitro inline list

[danielroe]

🔗 Linked issue

https://github.com/unjs/nitro/issues/836

❓ Type of change

• [ ] 📖 Documentation (updates to the documentation or readme)
• [x] 🐞 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

This automatically adds any string-based packages in build.transpile to be inlined in nitro as well, to improve DX for module authors and users.

📝 Checklist

• [x] I have linked an issue or discussion.
• [ ] I have updated the documentation accordingly.

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