As a customer, I want to know when I am viewing MCE docs and when I am viewing ACM docs. I want to understand the terminology. As an internal user/technical contributor, I want to know which files belong to which component. As a writer, I want to find what I need to update the docs without all the guess work.

MCE has three intro files. We need to pick one (the overview is most used by OCP) and maybe reduce the others, making sure that we still have retrievability. 

We need to clarify that release notes and other areas are for MCE or ACM