Configure Antora markdown plug-in

Make any changes which are necessary to improve the Antora plug-in to convert AsterixDB markdown pages to AsciiDoc. For example, can it handle all the required markup — tables, links, etc.? How does it handle image references? Are there any places where we will need to do text replacement, or can we work around that?

We have a fairly free hand to make any changes that we need to the upstream Markdown, bearing in mind that the Markdown has to be compatible with both the AsterixDB processing pipeline and ours.

Note that we only copy the markdown files from the AsterixDB mirror. We do not copy their image files or example files. We always use our own local image files and example files, even for material which has been transcluded from the AsterixDB mirror. This means that, if any of the documentation from the AsterixDB mirror contains a link to an image or an example file, we need to make sure we've stored an image or example file with the same name in the place where the converted AsterixDB documentation expects to find it.