Add a Feature Request subcategory

This has been posted/asked about in the past, and there is atleast a reply from squarp here
Maybe more related to roadmap / or just a list of stuff that has been requested.
But the e-mail form way to do it ofcourse works aswell.

one big benefit would be to not have the repeating "can we have … " or “is … planned” or atleast "is this thing asked about multiple times before, check here ->)