feat: platform agnostic serveStatic utility

[pi0]

🔗 Linked issue

Resolves #31

❓ 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

This PR implements a platform-agnostic serveStatic utility. In order to integrate with each platform, getMeta and getContents method have to be implemented according to the platform requirements.

Two additional/optional encodings and indexNames allow to optionally support serving compressed assets and with custom index.html check.

A fallthrough flag can also be provided and when enabled, the middleware avoids to throw an error or return 404 in case of asset is not matching and instead returns Promise<false> for custom logic handling and overlapping routes.

This implementation is based on nitro static.ts which @danielroe helped a lot on it's implementation and will be used in downstream after landing.

In future steps, we might also support unstorage and node fs adapters for serve static.

Co-Authored-By: Daniel Roe <daniel@roe.dev>

📝 Checklist

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

[codecov]

Codecov Report

Merging #480 (9d98d88) into main (5ec4b30) will increase coverage by 2.80%.
The diff coverage is 98.98%.

@@            Coverage Diff             @@
##             main     #480      +/-   ##
==========================================
+ Coverage   78.62%   81.42%   +2.80%     
==========================================
  Files          27       28       +1     
  Lines        3036     3231     +195     
  Branches      450      489      +39     
==========================================
+ Hits         2387     2631     +244     
+ Misses        649      600      -49     

Files Changed	Coverage Δ
src/utils/static.ts	98.96% <98.96%> (ø)
src/utils/index.ts	100.00% <100.00%> (ø)

... and 4 files with indirect coverage changes