Add Mini Ninjas audio fix

Game needs an external library for audio to work.

gamefixes-steam/35000.py

@@ -0,0 +1,7 @@
+"""Game fix for Mini Ninjas"""
+
+from protonfixes import util
+
+def main() -> None:
+	"""Game needs OpenAL library for audio to work, but the game doesn't include it by default, leading to missing audio in-game, even on Windows."""
+	util.protontricks('openal')