Add Mahjong Fight Girl Support (#275)

## Link to GitHub Issue, if one exists
n/a

## Description of change
Adds Mahjong Fight Girl Support

## Compiling
+

## Testing
Tested with VFG:J:E:A:2024100800 in HG mode with VFG IO. No
modifications made to data, other than avs-config.xml and
ea3-config.xml. B and C modes don't work because of serial touchscreen.
UKS mode doesn't work because of IO.

src/spice2x/util/unity_player.h

@@ -4,4 +4,6 @@
 
 namespace unity_utils {
     std::string get_unity_player_args();
+    void set_args(const std::string &args);
+    void force_show_cursor(bool bShow);
 }