Asciidoctor manual in Antora format

@mariocup,

Yes, that's exactly the plan. In fact, we've been working on that migration for several months now. Here's where it's happening:

* https://github.com/asciidoctor/docs.asciidoctor.org

* https://github.com/asciidoctor/asciidoctor/tree/v1.5.7-docs

As part of the migration, we're dividing up the a monolithic user manual into individual pages. That has been a long and excruciating process because there's so much documentation with lots of references, and a lot of it needed to be updated. But we're getting close to finishing. Once the migration is complete, we'll redirect the docs over to the new Antora-powered domain at https://docs.asciidoctor.org (not yet online).

Best Regards,

-Dan

p.s. You can see an early version here: https://asciidoctor-docs.netlify.com/asciidoctor/1.5/ (but keep in mind that's only a temporary URL).