fix: handle client close event

[didavid61202]

🔗 Linked issue

Downstream discussion: nuxt/nuxt#16046

❓ 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

Proxy respond did not get 'abort/destroy' when the client close the request, causing situation in Server sent event where user trigger close from the clinet EventSource, but the server request did not trigger the close listen as expected.

Reproduction: https://stackblitz.com/edit/unjs-nitro-khtcjd?file=routes%2Fsse.ts
Server Sent Event(SSE) example code: https://gist.github.com/Atinux/05836469acca9649fa2b9e865df898a2

Downstream discussion: nuxt/nuxt#16046
Related issues: http-party/node-http-proxy#1520

📝 Checklist

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

[codecov]

Codecov Report

Merging #8 (226388b) into main (f8cde14) will increase coverage by 0.09%.
The diff coverage is 100.00%.

❗ Current head 226388b differs from pull request most recent head e900b91. Consider uploading reports for the commit e900b91 to get more accurate results

@@            Coverage Diff             @@
##             main       #8      +/-   ##
==========================================
+ Coverage   64.98%   65.08%   +0.09%     
==========================================
  Files           8        8              
  Lines        1048     1051       +3     
  Branches       73       74       +1     
==========================================
+ Hits          681      684       +3     
  Misses        366      366              
  Partials        1        1              

Files Changed	Coverage Δ
src/middleware/web-incoming.ts	70.55% <100.00%> (+0.49%)	⬆️

[pi0]

Thanks for this PR. LGTM. It is worth to also check other upstream PRs for abort handling http-party/node-http-proxy#1580 http-party/node-http-proxy#1559