Conceptually, absolutely. The process for adding documentation, and tracking requests to add it, hasn't yet been set up. At a high level I expect to use issues on this new repository to track requests for creating and updating content, as well as soliciting assistance for making those changes. Per the proposal, the reviewers for what gets accepted is delegated through the various steering groups: language, ecosystems, and platform, and the review process itself will be using pull requests.
Once this repository gets set up, I'd very much appreciate getting these ideas collected into there. I, for one, was super grateful for the compiler internals guide that we have kind of tucked away in that repository - it helped tremendously when I was making a contribution into that code base, the vast majority of which I didn't understand at all.