feat: add static preset

[danielroe]

🔗 Linked issue

resolves #797

❓ 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)
• 🧹 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 adds a basic static preset that can be extended to create vercel-static, github-pages and more.

📝 Checklist

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

[codecov]

Codecov Report

Merging #1127 (c110817) into main (de7e59e) will increase coverage by 0.10%.
The diff coverage is 88.31%.

❗ Current head c110817 differs from pull request most recent head a2beecc. Consider uploading reports for the commit a2beecc to get more accurate results

@@            Coverage Diff             @@
##             main    #1127      +/-   ##
==========================================
+ Coverage   67.81%   67.92%   +0.10%     
==========================================
  Files          64       65       +1     
  Lines        6403     6406       +3     
  Branches      713      709       -4     
==========================================
+ Hits         4342     4351       +9     
+ Misses       2047     2041       -6     
  Partials       14       14              

Impacted Files	Coverage Δ
src/build.ts	42.13% <71.42%> (+0.89%)	⬆️
src/options.ts	87.73% <80.00%> (+0.20%)	⬆️
src/presets/vercel.ts	77.72% <92.30%> (+0.93%)	⬆️
src/presets/index.ts	100.00% <100.00%> (ø)
src/presets/netlify.ts	59.62% <100.00%> (-0.98%)	⬇️
src/presets/static.ts	100.00% <100.00%> (ø)
src/types/nitro.ts	100.00% <100.00%> (ø)

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[danielroe]

It can't be named static as it is a reserved word in JS. (Happy if you have any other ideas/recommendations!)

[pi0]

Actually object keys used for mapping can be. added a fix to bypass that :)