Optional Ping sound when new real time visitor appears

Hi! Could we get a ping sound when a new real time visitor arrives. Other real time analytics offer this and it’s seen as a key feature for them so I guess we should put it in too…

Other service set it to off at first, then it can be turned on from a little switch above their real time feeds.

see: Add sound on new visit and on click · Issue #3308 · matomo-org/matomo · GitHub