[Rust] Switch to Covalence and add permissions for commands
[Rust] Switch to Covalence and add permissions for commands

Permissions:

oxide.plugins
oxide.load
oxide.reload
oxide.unload
oxide.grant
oxide.group
oxide.revoke
oxide.show
oxide.usergroup

LaserHydra/Oxide,Visagalis/Oxide,Visagalis/Oxide,LaserHydra/Oxide