The CLI module currently contains a lot of logic that can control blueapi using a mixture of REST and listening to STOMP messages. It would be useful to move this logic out into its own class so it is reusable. This refactor could pave the way for

• System Tests #535
• CLI run plan non-blocking mode #485
• Make all CLI user-fault errors give clear messages rather than stack traces #489
• Testing strategy #472
• General hope of having a Python client for scripting the new architecture