FLUID-5511: Created placeholder pages

@jobara 
I think the goal of the new docs was to remove anything that might be confusing or misinform. With that in mind, I think we should either remove the reference, create a new page that just generally explains how a component could be split into subcomponents (we do have other subcomponent documentation, maybe this is already enough), or create an updated version of the pager subcomponents page in the infusions-docs repo.