Documents organization setting that configures what message edit
history can be viewed: content edits and topic/channel moves, only
topic/channel moves, or disabling viewing edit history completely.
Renames article to match new help article header and creates URL
redirect for previous article header.
Also, clean up and consolidate related articles.
Fixes#33684.
Co-authored-by: Alya Abbott <alya@zulip.com>
Updates "help/manage-a-user" links that are contextually for general
information about users to go to the new "help/introduction-to-users"
article.
Adds a link to "Manage a user" in the related articles section of
the new intro to users article.
