libp2p -> zenoh

[Evanev7]

initial rewrite of our networking to use zenoh.
features:

• tokens are reliable but not move across the event log for significant reductions in catchup time.
• mdns has been replaced with a tuned multicast udp discovery mechanism

known issues:

• bootstrap peers will be removed soon
• cancellation doesnt seem to propagate correctly at the moment
• python node ids are not correctly mapped to rust node ids (cosmetic)
• some places have deabstracted a little too far (inline NetReceiver for commands in master) and a nice stream wrapper is probably necessary
• broken tests

future work:

• synchronized state over zenoh's storage mechanism
• developing the abstraction on the rust/python boundary for better devx

requires heavy testing as always