init(lib): add Tanabata FM lib

include/tanabata.h

@@ -0,0 +1,52 @@
+// Tanabata file manager lib
+// By Masahiko AMANO aka H1K0
+
+#ifndef TANABATA_H
+#define TANABATA_H
+
+#ifdef __cplusplus
+#include <cstdint>
+#include <cstdio>
+extern "C" {
+#else
+#include <stdint.h>
+#include <stdio.h>
+#endif
+
+#include "core.h"
+
+// Tanabata (七夕) - the struct with all databases
+typedef struct tanabata {
+    Sasahyou  sasahyou;   // Sasahyou struct
+    Sappyou   sappyou;    // Sappyou struct
+    Shoppyou  shoppyou;   // Shoppyou struct
+} Tanabata;
+
+// ==================== DATABASE SECTION ==================== //
+
+// Initialize empty tanabata
+int tanabata_init(Tanabata *tanabata);
+
+// Free tanabata
+int tanabata_free(Tanabata *tanabata);
+
+// Weed tanabata
+int tanabata_weed(Tanabata *tanabata);
+
+// Load tanabata
+int tanabata_load(Tanabata *tanabata);
+
+// Save tanabata
+int tanabata_save(Tanabata *tanabata);
+
+// Open tanabata
+int tanabata_open(Tanabata *tanabata, const char *path);
+
+// Dump tanabata
+int tanabata_dump(Tanabata *tanabata, const char *path);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //TANABATA_H