Make `lightchain run` to run `lightchain init` in the background

[EnchanterIO]

Atm there is no actual need for running lightchain init before the run as no manual configuration is really happening after the init cmd.

As a user, I want to be able to run lightchain with just 1 cmd without running the init cmd first.

[ggarri]

Not sure if we want this feature. Let have a chat about it