SilvaGunner shitpost music addition. Adds MGS3's caution theme for stealth, Shagohod theme for control, and Snake Eater (Ladder Version) for anticipation/assault.

Drop into mod_overrides. Requires BeardLib 2.5+ and BLT.

Stealth: https://www.youtube.com/watch?v=ySAPLa-FloY
Control: https://www.youtube.com/watch?v=nfLRJuqu0jg
Anticipation/Assault: https://www.youtube.com/watch?v=f1VdfF50uBg