Redeem pub and room invites from (redesigned) Directory screen

[Chardot]

When a user pastes in an invite code in to the directory/network tab it should let them redeem an invite.

And when redeeming an invite, we need a more clear UI for what will happen, and what has happened. Once it's redeemed we should pull that feed from the invited identity, show a success message saying you're now connected, and take the user to the profile of the invite they just redeemed.