Bring back /cost command

What variant of Codex are you using?

App

What feature would you like to see?

With the switch to usage-based pricing for business plans and the release of 5.5, I find myself spending enough money that I have to start worrying a little bit about cost control. It is currently very hard to even know which threads I'm spending the most money on. Adding back the /cost command would be the easiest way to do so. Alternatively, the /status command could display credit usage of the current thread.

Additional information

_No response_