[FB] Using abc.ABC instead of Protocol for ModelProtocol

[jacopoabramo]

While working on redsun-simulator, it occurred to me that I'm starting to implement the same pattern for all devices, and that is using the Configurable protocol in all of them. I also added the possibility to read/change the configuration of the ModelInfo. Technically this should be an optional Protocol in bluesky (like everything else) but it might be worth to use as a baseline abstract class. It also would enforce the usage of a standardized __init__ function which seems more coherent with the usage.

An alternative would also be using ModelProtocol as a mixin, but I fear it might be misunderstood.