adds /ban, /unban, /baninfo, /banlist, /role, /mod, and /admin commands

[ghost]

depends on https://github.com/cabal-club/cabal-core/pull/80

I've tested some scenarios on a local cabal (but not all). I was able to add an admin, see their ban (with /banlist) and see the ban disappear with /unban.

[cblgh]

@substack do you have anything against swapping out /ban, /unban etc for /hide /unhide (or /show)? as per

• https://gist.github.com/cblgh/617e01f851a3b2cb0417200b88ba4960
• https://gist.github.com/cblgh/ef643b1f35511ae86dcf262b8717cc5f

it shouldn't change anything while still keeping the semantics intact as we add /block, /mute etc

[ghost]

These can be changed to whatever. The bans aren't even used yet in the moderation views, I was just going off of how the other PR added cabal.ban(). We could also add the other methods that the draft command guide uses, this was mostly to flesh out how those would all be implemented.

[cblgh]

yeah that's what i thought, just figured one easy win would be to use /hide since that's the effect of a ban atm

also the prs are ofc AMAZING <3

[ghost]

closing this as #39 takes in these changes and adds more