Add IOFile and headers for NCSD/NCCH

include/loader/ncsd.hpp

@@ -0,0 +1,18 @@
+#include <array>
+#include "helpers.hpp"
+#include "io_file.hpp"
+#include "loader/ncch.hpp"
+
+struct NCSD {
+    static constexpr u64 mediaUnit = 0x200;
+
+    struct Partition {
+        u64 offset = 0; // Offset of partition converted to bytes
+        u64 length = 0; // Length of partition converted to bytes
+        NCCH ncch;
+    };
+
+    IOFile file;
+    u64 size = 0; // Image size according to the header converted to bytes
+    std::array<Partition, 8> partitions; // NCCH partitions
+};