feat: add myjson.online driver

[justboe]

🔗 Linked issue

#325

❓ 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

📝 Checklist

This PR adds the myJson driver requested by issue #325. Also added basic documentation.

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

[nuxt-studio]

✅ Live Preview ready!

Name	Edit	Preview	Latest Commit
unstorage	Edit on Studio ↗︎	View Live Preview	beab2d3

[itpropro]

Thanks a lot for your driver!
I am not really sure if we need an additional driver for this service, as there already is the general http driver. Is there any limitation that prevented you from using the http driver with custom TransactionOptions for headers using the opts parameter?

[codecov]

Codecov Report

Attention: Patch coverage is 6.18557% with 91 lines in your changes missing coverage. Please review.

Project coverage is 61.33%. Comparing base (4d61c78) to head (232db00).
Report is 122 commits behind head on main.

Files with missing lines	Patch %	Lines
src/drivers/myjson.ts	5.20%	91 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #366      +/-   ##
==========================================
- Coverage   65.05%   61.33%   -3.72%     
==========================================
  Files          39       40       +1     
  Lines        4055     3440     -615     
  Branches      487      579      +92     
==========================================
- Hits         2638     2110     -528     
+ Misses       1408     1327      -81     
+ Partials        9        3       -6     

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[pi0]

Thanks for the work on PR. I have made some refactors but reading docs it seems we cannot support current API because unstorage needs creating records with custom id (user key) but API returns a generated UUID which is incompatible.