WIP: New API documentation 📖

Hey Inkdroppers,

I have been working on building new API documentation to provide plugin developers with more comprehensive and easy-to-understand docs.
The design is inspired by Stripe’s API docs.
Here is the WIP:

And here is the source code:

There are still many missing pages and broken links, but I wanted to share the current progress with you guys.
I’d be so happy if you had some free time and helped me migrate pages from the old docs to the new one.

This docs is about the APIs only, and I’ll be also working on creating a new user manual site!