Feature Request: Built-in method to list all connected sockets

[dDeepLb]

Hi, thanks for the awesome work on socketioxide!

I'd like to propose a feature: a built-in method to retrieve all currently connected sockets for a namespace (or globally).
This would simplify managing server state for broadcasting, inspecting socket info, etc.

Currently, the only way to do this is to manually track sockets like in a HashMap or smth during connection and disconnection events, which is error-prone and adds boilerplate.

Example API (hypothetical):

io.connected_sockets("/") -> Vec<SocketRef>

[Totodore]

Did you consider SocketIo::sockets? You can then filter it with SocketRef::connected

[dDeepLb]

Oh, I was looking around and didn't find such a treasure. Thanks a lot!
But still if it's not hard, it would be nice to have function around to get all the connected sockets without all of this dance.