fgo: fgohook finally added

Credits:
- Coburn
- domeori
- Mitsuhide
- OLEG
- rakisaionji

fgoio/config.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <stdbool.h>
+
+struct fgo_io_config {
+    uint8_t vk_test;
+    uint8_t vk_service;
+    uint8_t vk_coin;
+};
+
+void fgo_io_config_load(
+        struct fgo_io_config *cfg,
+        const wchar_t *filename);