[SDNL] Mute/volume setting for the Announcer

I’d like to suggest an option to mute or have a volume setting for the announcer. I find them to be quite distracting. This would also be a nice option for those who don’t like the voicelines with swearing.

Optionally, a frequency setting. Kinda like how Battleblock Theatre has an option for announcer/crowd reactions and how often you want to hear them.