Add notification service

[FabianAronsson]

When a participant is selected by the room owner they should be informed by a sound effect and a message in the title bar

[Mojtabarezaei4]

Do you think this should be an extra feature?

[FabianAronsson]

This is not per se something that is absolutely needed to make the room working properly. So yes, it is more of a QoL.

[FabianAronsson]

In addition, it would be nice to have some sort of desktop/web browser notification (if possible).

[Mojtabarezaei4]

I like the idea!