Add modtag for staff

[xtomyserrax]

As far as I know there isnt a command for staff to change a clan tag. This would be useful if we have a clan for example with an offensive tag, so we can change it.

The same thing would be useful with clan description.

Also a command so staff could clear a clan bb?

Most important one at least for me would be for tag, the other two just came into my mind later haha