Reshuffle dependency management docsThis commit reshuffle existing dependency management docsinto the new dependency management chapter. It's worth notingthat there's no new content at this point, nor any effort tomake it consistent. It just moves things around, and thereare still quite a few places where dependency management docsare found.It doesn't try to fix dead links either.
Initial structure for new dependency management docsThis commit introduces a new TOC for the dependencymanagement docs. This is just the basic structure, anddocs have either to be shuffled into it, or written whenmissing.