I have been plugging along making some Grav sites. I have made a theme that I plan to turn into a Skeleton in the near future. I used the Antimatter Blog skeleton and I am going through all the template twig files and making them work with my new Bootstrap theme. There are several form twig files and a forms folder with more twig files. I don’t see any examples of forms being made from these files in any of the skeletons packages I have toyed with. Is this for a Forms plugin that is not released yet? Or am I missing something in documentation?
Yup, it’s from an unreleased forms plugin that we have in development. You can safely ignore those for now 
Looking at the structure I can see what you have in mind, looks like a great addition.