We already have this via bbcode.
I would like an easier way to do columns than the BBCode method, as it is sometimes unwieldy, but that is not necessarily what this feature request is asking for.
You can use tables for this https://www.worldanvil.com/w/WorldAnvilCodex/a/bbcode#tables or the columns https://www.worldanvil.com/w/WorldAnvilCodex/a/bbcode#columns