PoC: Anonymized GossipSub

[AkshayaMani]

This PR introduces an initial proof of concept for an anonymized version of GossipSub utilizing our Mix transport.

Key Changes

• Implemented a basic PoC with message publishing and subscription using the Mix transport.
• Utilized regular TCP transport for peer connections, since we want to anonymize only the first hop.

Known Issues

• Encountering challenges in establishing peer connections via TCP transport due to the presence of multiple transports (TCP and Mix) within the same switch.

Next Steps

• Resolve TCP connection issues.
• Introduce multiple routing paths (3-4) for each message to improve reliability.

This PR serves as a foundation for further refinement of the anonymized GossipSub implementation.