[Feature Request] Render asciidoctor files instead of showing them as raw text.

Created by: Icantjuddle

Feature request description

Render asciidoctor files instead of showing them as raw text.

Describe alternatives you've considered.

I could use markdown for everything (which is supported) but for long readmes it is sub-optimal and would require us to convert all of our asciidoc files to markdown. As well markdown's feature set is a small subset of asciidocs. Github has open sourced much of their rendering tools so perhaps it wouldn't be that hard to match it.