[Enhancement] [FireStore] Explore possibility of integrating pubsub over IPFS network

Hi guys, just an idea that i've working on my mind.

We could explore the viability of integrating the IPFS or IPFS Private Network pubsub over the clients for optimizing the network usage and offload FireStore Servers using something like https://github.com/orbitdb/orbit-db , clients would star sharing and replicating data between them.

It's just a propossal and an experimental idea.

And also for the grpc webservice of firestore between the browser and the server we could also explore WebRTC DataChannel for transport like in this repo https://github.com/jsmouret/grpc-over-webrtc