feat(mix): serialization

[richard-ramos]

Adds these files from mix repo and their tests

[github-actions]

🏁 Performance Summary

Commit: 60997ec4defefdf39b1f0e4c6d6c2cd87cd7b7e0

Scenario	Nodes	Total messages sent	Total messages received	Latency min (ms)	Latency max (ms)	Latency avg (ms)
Base test	10	100	900	0.275	2.217	1.003
Low Bandwidth rate 256kbit burst 8kbit limit 5000	10	100	900	0.212	56.354	8.053
Packet Reorder 15% 40% with 2ms delay	10	100	900	0.236	5.488	2.999
Queue Limit 5	10	100	900	0.252	2.726	0.923
Latency 100ms 20ms	10	100	900	20.281	227.035	119.052
Burst Loss 8% 30%	10	100	900	0.338	2.276	0.983
Duplication 2%	10	100	900	0.257	2.221	0.921
Corruption 0.5%	10	100	900	0.312	2.493	0.926
Packet Loss 5%	10	100	900	0.324	2.401	1.071
Combined Network Conditions	10	100	900	0.206	328.620	130.474

📊 View Latency History and full Container Resources in the Workflow Summary

[gmelodie]

Same as above, we won't need this

Suggested change

	proc init*(T: typedesc[Hop], multiAddress: seq[byte]): T =
	T(
	MultiAddress:
	if multiAddress == newSeq[byte](addrSize):
	@[]
	else:
	multiAddress
	)
	proc getHop*(hop: Hop): seq[byte] =
	return hop.MultiAddress