fix(add): respect custom dirs from nuxt project

[BobbieGoede]

🔗 Linked issue

• Nuxt 4 Directory structure support #551

❓ 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)
• ✨ 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 #551

Changes the generated api template path to be resolved from rootDir instead of srcDir if compatibilityVersion: 4, not sure if other templates should be from rootDir as well, let me know.

I also changed the template paths to use the config dir where applicable, not sure if there's an open issue for this 🤔

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 34.61538% with 17 lines in your changes missing coverage. Please review.

Please upload report for BASE (main@e49583f). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
src/utils/templates.ts	45.00%	11 Missing ⚠️
src/commands/add.ts	0.00%	6 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##             main    #586   +/-   ##
======================================
  Coverage        ?   1.29%           
======================================
  Files           ?      44           
  Lines           ?    2865           
  Branches        ?      44           
======================================
  Hits            ?      37           
  Misses          ?    2786           
  Partials        ?      42           

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[danielroe]

looks like we also need to update the tests to pass the config