Add a command that makes the bot automatically transition between blocks

[Dumitru Mițca]

A command that makes the bot periodically check if the state can progress to a next state and do so if possible would be rather neat.

Issues:

• name
• C and E blocks would probably be the hardest to implement, given they wait for user interaction (maybe some tokio channel stuff would be good?)

[Dumitru Mițca]

This should be much easier to do once #66 is finalised