Support `/quit` command as an alternative to `/exit`

[jere-mie]

Feature Description

Users will be able to use the command /quit that does the exact same thing as /exit

Use Case

I switched from Copilot CLI and Codex CLI to Command Code. Both copilot and codex supported /quit, so my muscle memory keeps going to type /quit. I think this would not only benefit me but any other devs who are switching to command code

Additional Context

How important is this to you?

Nice to have