[Deliverable] Minimal Community Specification and Implementation

[chair28980]

1. Specify community procedures, including the encryption, reliability and functional scope of each. This forum post serves as a starting point.
2. Using spec from (1) as a basis, define message flows to be moved to separate shards (e.g. community control + content messages). Extracting community messages off the common open shard (also used by 1:1 chats) should be considered.

As well as other low-hanging fruit improvements previously identified.

Breaking changes and migration plans, if necessary, should be specified as part of this output.

Finally, proceed with the implementation of (2).

Tasks

• Minimal Community Specification status-im/status-go#5821

[plopezlpz]

Tasks:
status-im/status-go#5821