Add removetimeout command

[Victoria-DR]

Purpose

Make it possible for an existing timeout to be removed from a user and recorded in our database. Currently, we can use Discord's tools to remove in-progress timeouts, but we don't get a message in the audit-logs channels, or a record in our mod_log table, of the action.

Proposed Solution

Pretty much the same as the timeout command, but the duration should always be null.

Acceptance Criteria

Please list the requirements the implementation of this feature should meet.

• Remove timeouts from users permanently.