refactor(rendezvous): Split Rendezvous Protobuf and add tests

[rlve]

Changes:

• split libp2p/protocols/rendezvous.nim into:
  • libp2p/protocols/rendezvous/rendezvous.nim
  • libp2p/protocols/rendezvous/protobuf.nim
• add tests for Rendezvous Protobuf

Note

No other code changes to the Rendezvous and Rendezvous Protobuf implementations besides updating imports.

[github-actions]

🏁 Performance Summary

Commit: d2c5f8d00148a440b0334586ebf3e008b8ac5eb0

Scenario	Nodes	Total messages sent	Total messages received	Latency min (ms)	Latency max (ms)	Latency avg (ms)
Base test	10	100	900	0.305	2.482	1.049
Low Bandwidth rate 256kbit burst 8kbit limit 5000	10	100	900	0.326	21.626	3.252
Packet Reorder 15% 40% with 2ms delay	10	100	900	0.279	5.703	2.917
Queue Limit 5	10	100	900	0.302	2.459	0.950
Latency 100ms 20ms	10	100	900	36.226	214.795	120.370
Burst Loss 8% 30%	10	100	900	0.379	2.351	1.047
Duplication 2%	10	100	900	0.352	2.717	1.072
Corruption 0.5%	10	100	900	0.374	2.827	1.070
Packet Loss 5%	10	100	900	0.343	2.343	1.072
Combined Network Conditions	10	100	900	0.235	249.532	118.572

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