Improve sync classes (#108)

script/MPScriptData.hpp

@@ -0,0 +1,11 @@
+#pragma once
+#include "types.hpp"
+
+struct MP_SCRIPT_DATA
+{
+    SCR_INT  Index; // this is an enum
+    uint64_t Args[15];
+    SCR_INT  InstanceId;
+    uint64_t MoreArgs[4];
+};
+static_assert(sizeof(MP_SCRIPT_DATA) == 21 * 8);