add fixes for mashed (#316)

Author: ChrisOboe

gamefixes-steam/281280.py

@@ -0,0 +1,12 @@
+"""Game fix for Mashed(281280)"""
+
+from protonfixes import util
+
+
+def main() -> None:
+    """Mashed needs win xp otherwise cars may fall through the ground"""
+    """https://www.pcgamingwiki.com/wiki/Mashed#Jumping_Bug_Fix"""
+    util.protontricks('winxp')
+
+    """Hide the launcher"""
+    util.append_argument('-VS0 -CS0')