Improve Documentation Presentation and Organization

Something like Docsify might cover both of those. Depending on what we use, it would also get rid of DocToc.

We also need to consider whether we add documentation for dependencies or, more likely linking to their documentation (e.g. Worlds).

why not

#335 (just so no one else tries to start this)

need https://github.com/js-org/js.org/pull/2052

mostly done. Indeed we can link to dependencies doc or even include it directly (via docsify) Or put docsify in all prismarine projects, that would be ok too