Possibility to forward a change to a subset of clients (conditional broadcast) about taipy

[FlorianJacta]

I think we have internally a _broadcast function that broadcasts to a list of clients. Is it true?

[FredLL-Avaiga]

Conditional broadcast is achieved via callback:
broadcast_callback is called on every State with parameters and the callback can modify (or not) each state.

[github-actions]

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[FabienLelaquais]

A great use case is a Chat application: not all clients should receive a message sent to a subset of connected users.

[jrobinAV]

A use case is in this issue: Avaiga/taipy-doc#941