broadcast feature flags changes to client apps (instead of client apps making calls to backend api)

[Abdenasser]

sometimes you'd disable a feature flag from Django admin which then disables the flagged feature on the server but if your client apps still hold the old state it can cause confusion among your users since the feature will still be active on their side while the functionality would not ... it might be better if we can broadcast feature flags changes to client apps using a channel then on the client apps whenever we get a new event we update the state in the background so that whenever we get a fag check we can then access the local updated state and keep everything in sync