This commit reorganizes the ROOT module index.adoc page to include a
Table of Contents and also some "frequently sought pages", like how to
create and publish a new Fedora Docs site.
This commit also reworked some of the "Adding new docs" page. I followed
the one sentence per line convention and imported the partials from the
ROOT module for things like mailing list URLs.
This commit was tested and confirmed to work locally. Should be ready to
merge but wouldn't mind a peer review.
Signed-off-by: Justin W. Flory (he/him) <git@jwf.io>
