I've noticed that in
/sitecore/layout there is a
Controllers folder (first item underneath actually). In that folder you can add items of type
Controller. These items have fields for a controller name and action name, so they seem to map to some mvc code.
I did check the links of the template and noticed one usage (
/sitecore/system/Settings/Rules/Insert Options/Rules/MVC Controllers) but this rule is for setting insert options on the folders in the Controllers section in Layouts.
So, my question is: what is the purpose of these items? How could I use them? And why?