fix(cloudflare-pages): filter out overlapping public assets dirs

[danielroe]

🔗 Linked issue

resolves #1844

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 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)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Cloudflare doesn't expect to have overlapping public assets dirs. This prevents using overlapping dirs, preferring instead the top level dir if it overlaps a child dir.

📝 Checklist

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

[codecov]

Codecov Report

Merging #1859 (f3c017c) into main (2d803a3) will increase coverage by 0.29%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1859      +/-   ##
==========================================
+ Coverage   52.09%   52.38%   +0.29%     
==========================================
  Files         170      170              
  Lines       11787    11806      +19     
  Branches      901      910       +9     
==========================================
+ Hits         6140     6185      +45     
+ Misses       5551     5525      -26     
  Partials       96       96              

Files	Coverage Δ
src/presets/cloudflare-pages.ts	62.50% <100.00%> (+3.34%)	⬆️

... and 2 files with indirect coverage changes

[pi0]

Thanks! (haven't tested locally but trust you did)