fix: scan middleware and print tree list in ascending alphabetical order

[danielroe]

🔗 Linked issue

nuxt/nuxt#19234

❓ 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

While not exactly a bug, I think it makes sense to scan middleware in alphabetical order rather than the reverse, and also print the generated files that way too.

📝 Checklist

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

[codecov]

Codecov Report

Merging #981 (b11c218) into main (4585ca8) will not change coverage.
The diff coverage is 50.00%.

@@           Coverage Diff           @@
##             main     #981   +/-   ##
=======================================
  Coverage   67.79%   67.79%           
=======================================
  Files          60       60           
  Lines        6132     6132           
  Branches      691      691           
=======================================
  Hits         4157     4157           
  Misses       1966     1966           
  Partials        9        9           

Impacted Files	Coverage Δ
src/utils/tree.ts	12.12% <0.00%> (ø)
src/scan.ts	72.72% <100.00%> (ø)

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