fix: fully resolve internal paths for autoimports

[danielroe]

🔗 Linked issue

❓ 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

Currently, generated auto-imports are relative to #internal/nitro which means they have no type safety unless typescript.internalPaths is set. This PR resolves them so we don't need to expose access to #internal/nitro.

📝 Checklist

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

[codecov]

Codecov Report

Merging #543 (f9f09ad) into main (2049def) will increase coverage by 0.11%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #543      +/-   ##
==========================================
+ Coverage   63.96%   64.08%   +0.11%     
==========================================
  Files          55       55              
  Lines        3644     3653       +9     
  Branches      400      403       +3     
==========================================
+ Hits         2331     2341      +10     
+ Misses       1299     1298       -1     
  Partials       14       14              

Impacted Files	Coverage Δ
src/build.ts	54.54% <100.00%> (+1.91%)	⬆️

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