feat(docs): migrate to doc-kit

[avivkeller]

Migrates the docs to use doc-kit

Demo: https://forked-by-avivkeller.github.io/undici/

---

Fixes: #3132
Fixes: #183
Fixes: #1205
Fixes: #1865
Closes: #2208

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.36%. Comparing base (a0806e1) to head (bae13a9).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5438   +/-   ##
=======================================
  Coverage   93.36%   93.36%           
=======================================
  Files         110      110           
  Lines       36993    36993           
=======================================
  Hits        34537    34537           
  Misses       2456     2456           

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[avivkeller]

cc @nodejs/undici @nodejs/web-infra

[mcollina]

This is impressive, huge +1 for doc-kit!!

If you are up for it, I would slightly prefer to have a system to provide the docs for the various release lines.
When a release is cut, its docs are built and stored somewhere.

This is why I was thinking to use the other repo.

[avivkeller]

No problem! We are working on a similar pipeline for webpack, so it shouldn't be too hard. However, you should note that the previous docs don't follow doc-kit structure, so older docs might not render 100% the same as newer docs.

Just to confirm, let's say I change this PR to only change the doc format to support doc-kit, and then a PR in the undici website repo to read the various tags and build a website around it?