We currently have the ability to use Styled Text or HTML as content styles in the sidebar.
It would be nice to be able to use Markdown as a content type in the sidebar as well. Would pair well with the Markdown page style that shipped with RapidWeaver v6, or, really any page style where the user would like to use Markdown to create their content.
IMHO I don’t think that would be such a good idea. You’d be doing the same thing as using Pluskit’s @import() which I personally cringe at… You would be importing extra, unneeded stuff on the page.
I’d much rather see this as a built in feature for RW. And I’m fairly certain it wouldn’t be too difficult to do. Seems like a slam dunk easy feature to add.