Describe your enhancement

Back when I was heavily playing RS I remember you were limited to 1 controller per network. in 1.21.1 I am noticing you can have more than 1.

My suggestion is to limit to 1 Controller per network but have controller slaves, secondary controllers for expansions over larger networks. For me that feels more thematic than simply placing down extra controllers when you get to the limits.

Controllers will become a multiblock in the near future!
See #82
I think the naming is fine for now. We can think about this when the time comes.

Maybe instead of changing that, we can rename controllers to power acceptors, since they don't really control anything anymore after the network info was removed from them