Minimal draw

[liamhuber]

@srmnitc had the really nice idea of a .draw kwarg that would draw a more minimal representation retaining the fact nodes are connected, but removing data on the specific channels on each node and how they're connected. We should experiment and see if it's worth decomposing connections to distinguish data vs signal (by colour?), and we may want to change the edge format to show arrows instead of plain lines to guarantee the flow is unambiguous.

@srmnitc I am aggressively assigning this to you because I think I remember you implying you'd implement it 😂 but it's a great idea and I am willing to implement it eventually myself too.