Adds `essentials.seen.uuid` permission requirement to show uuids in `/seen`. People were complaining this cluttered it so whatever. Also adds said permission to the `essentials.seen.extra` permission group.
Closes#4499.
Adds `essentials.alts` also to allow server admins to not give mods the ips of users.
Co-authored-by: Josh Roy <10731363+JRoy@users.noreply.github.com>