docs: add instructions for bun

[colinhacks]

Adds instructions for users of the Bun package manager (where relevant)

[nuxt-studio]

✅ Live Preview ready!

Name	Edit	Preview	Latest Commit
nitro	Edit on Studio ↗︎	View Live Preview	99abf56

[codecov]

Codecov Report

Merging #1672 (99abf56) into main (a228372) will decrease coverage by 0.02%.
Report is 2 commits behind head on main.
The diff coverage is n/a.

❗ Current head 99abf56 differs from pull request most recent head 7f13c18. Consider uploading reports for the commit 7f13c18 to get more accurate results

@@            Coverage Diff             @@
##             main    #1672      +/-   ##
==========================================
- Coverage   77.79%   77.78%   -0.02%     
==========================================
  Files          76       76              
  Lines        7836     7827       -9     
  Branches      805      804       -1     
==========================================
- Hits         6096     6088       -8     
+ Misses       1738     1737       -1     
  Partials        2        2              

see 3 files with indirect coverage changes

[pi0]

Thanks. With last fixes i think we are almost ready to go 🔥 (i will add automated ci shortly as well for bun)