Forward important administrator@freeside.co.uk emails to the Staff category

We have the private Staff category already, so it would make sense to forward all the important emails from administrator@freeside.co.uk to this category as new posts.

@Epictek notes that Discourse supports this natively:

We should implement this, but it looks like we may need to setup reply-by-email first. This is relatively simple to do:

Freeside uses the GSuite thingy for email, so it’s a case of logging in as administrator@freeside.co.uk and setting up a dedicated account for it to use.