feat: add a hook and provider to manage user connection

[MartinCupela]

Motivation Provide a hook that would control client (user) connection / re-connection.

Proposed solution

• [ ] hook implementation (such as this closure based one and this one with cancelation feature)
• [ ] provider implementation (react-activity-feeds StreamApp equivalent)
• [ ] docs
• [ ] tests

Acceptance Criteria

• [ ] hook does not try to connect if a connection attempt is in progress
• [ ] hook takes care of disconnect and connect if user identifier changes