Enhancement: Ambience Sounds Options

[BenjaminTheHedgefox]

Issue Checklist

• I have properly named my enhancement
• I have checked the Issues/Discussions pages to see if my enhancement has already been suggested

What is your suggestion, and why should it be implemented?

Basically, allows you to mute/unmute the sound effects from any stages that make sounds (Like Philly's train or the thunder in the Spooky House) to let the player focus on solely the music audio alone, if they don't want to be distracted.

I was inspired by the commented out code for ambient rain/car sounds in Weekend 1's stage, since it seemed like a cool concept that could be used in full game.

There could possibly be a preference for how heavy/quiet of a sound can play ambiently, going from Soft to Loud in terms of audio.
(Rain/Car sounds would be soft, while the train rushing or thunder would be loud.)