Add Polaris Chord Support (#361)

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

## Description of change
Adds support for Polaris Chord

## Testing
Tested with XIF:J:A:A:2024122300. IO/ICCA works, game successfully
connects to server and is playable.

src/spice2x/CMakeLists.txt

@@ -443,6 +443,9 @@ set(SOURCE_FILES ${SOURCE_FILES}
         games/mfg/mfg.cpp
         games/mfg/io.cpp
         games/mfg/bi2a_hook.cpp
+        games/pc/pc.cpp
+        games/pc/io.cpp
+        games/pc/bi2x_hook.cpp
 
         # hooks
         hooks/audio/audio.cpp