The maintainers had a discussion internally and decided it's unlikely
that we'll have the capacity to try to do a rewrite, which was the
original reason for the suffix's presence. So, now can get rid of it.
This adds some new tools in CI for lint the book and also sets up
automated deployment to GitLab Pages. Also adds a readme that suggests
reading the book, since that's where all the information will be.
This drastically reduces the maintenance burden.
You may notice the `CODE_OF_CONDUCT.md` is deleted here. This is because
I don't feel like updating the relevant parts and I don't think this
will ever actually have a community build around it. If that changes for
some reason, I'm not opposed to adding a code of conduct again.
