Exposed registering a handler for playing sounds.

src/play_sound.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include "decomp/include/types.h"
+#include "libsm64.h"
+#include <stdio.h>
+
+extern SM64PlaySoundFunctionPtr g_play_sound_func;
+
+extern void play_sound( uint32_t soundBits, f32 *pos );