add half-working CXB support

cxbio/config.h

@@ -0,0 +1,17 @@
+#pragma once
+#include <windows.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+struct cxb_io_config {
+    uint8_t test;
+    uint8_t service;
+    uint8_t coin;
+    uint8_t cancel;
+    uint8_t up;
+    uint8_t down;
+};
+
+void cxb_io_config_load(
+        struct cxb_io_config *cfg,
+        const wchar_t *filename);