* [Mod] Check for reason length & remove unused vars
This PR also remove unused variable.
* Blame me
* Apply Kowlin order.
Text will get truncate in audit logs in case we're going over 512 characters.
* This is already handled by ban_user()
* Use `get_audit_reason()` in `[p]tempban`
* Add a new kwarg to `get_audit_reason()` instead
* Include `[p]voiceban` and `[p]voiceunban`
* Include Mutes cog
Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>