fix(scan): do not dedup middleware handlers

[danielroe]

🔗 Linked issue

nuxt/nuxt#18518

❓ 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

Currently we are deduplicating middleware, which means only one middleware will ever be included in the built app. We should probably only deduplicate routes that have a path.

📝 Checklist

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

[codecov]

Codecov Report

Merging #880 (8e66f14) into main (2c52c62) will decrease coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #880      +/-   ##
==========================================
- Coverage   67.42%   67.35%   -0.08%     
==========================================
  Files          59       59              
  Lines        5852     5853       +1     
  Branches      633      632       -1     
==========================================
- Hits         3946     3942       -4     
- Misses       1897     1901       +4     
- Partials        9       10       +1     

Impacted Files	Coverage Δ
src/scan.ts	72.72% <100.00%> (+0.25%)	⬆️
src/rollup/config.ts	91.66% <0.00%> (-0.93%)	⬇️
src/utils/index.ts	52.35% <0.00%> (-0.53%)	⬇️

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[pi0]

Thanks!