Draft: Moco: Rework a bit the controller + monitor feature

Related to #4205

This PR

• Create a real MocoState to know every available states
• Expose MocoState from moco.state()
• Added a new function moco.view() to monitor the state

This was designed to not break the actual API

This is backport from ID06 that could be merged for everybody.

This have to be tested on a real moco before merging.

FYI @mauro