As previously discussed there tends to be useful documentation floating around that is neither appropriate for the website nor the official docs. The forge attempts to capture this material, some of which was previously on the wiki.
It’s intended to be hosted under
forge.rust-lang.org or perhaps integrated directly into the website. The maintenance model here is that each page must be vetted for its importance before created, but individual pages can be kept up to date without the scrutiny or attention to consistency and quality that the website receives.