GameSettings: Set CPUThread to False in GWR.ini.

As mentioned in
https://wiki.dolphin-emu.org/index.php?title=Wave_Race:_Blue_Storm,
the menu may freeze otherwise.

* Data/Sys/GameSettings/GWR.ini: New file.

Co-authored-by: JosJuice <[email protected]>

Data/Sys/GameSettings/GWR.ini

@@ -0,0 +1,5 @@
+# GWRE01, GWRJ01, GWRP01 - WAVE RACE / BLUE STORM
+
+[Core]
+# Disable multi-threading to avoid a hang in the game menu.
+CPUThread = False