Set up Awesome AsciiDoc directory

In order to complete the initial content for asciidoc.org, we need somewhere for the links in the resource section to point. The AsciiDoc WG has discussed the idea of curating a directory of software and resources that support the AsciiDoc ecosystem, tentatively named Awesome AsciiDoc.

There are two decisions: 1) where the directory should live and 2) which links to include.

Since we don't yet have a design for additional pages in asciidoc.org, this directory should start out as a file in an git repository. But since this may end up graduating to a page, it makes sense to put it in the repository for asciidoc.org. The alternative is to set up a dedicated repository. However, there's overhead in creating another repository and it doesn't give us a clear path to publishing the file in the future.

As for which links to include, the best approach is to create a draft and run it by the AsciiDoc WG. We should try to keep it minimal at first and be very particular about which links to include. Our recommendations will carry a lot of weight, so we have to be mindful of the impact they have on the perception of AsciiDoc. The first step is to identify a list of categories, then fill in those categories with links.

This issue will be complete once we have a target for the resource links on the new asciidoc.org.