Light client integration into p2p network

[wemeetagain]

Integrating consensus light clients into the existing p2p network (rather than solely relying on a REST API) opens the door for light client gossip and other more efficient and decentralized communication.

At a high level, what changes would be required and what should be considered when integrating a light client, or light client functionality, into the p2p network?

Possible outcomes:

• Add websocket libp2p transport to consensus specs
• Transpose lodestar light client REST API to libp2p protocols, specification & implementation
• Explore light client update gossip, specification & implementation
• Explore ENR & MetaData extensions, if required