Added support for NAND saving in WarioWare D.I.Y. and Jam with the Band (#6)

Also improved speed of creating save files

common/CardSaveType.h

@@ -1,7 +1,7 @@
 #pragma once
 
 /// @brief Enum representing the save type.
-enum class CardSaveType
+enum class CardSaveType : u8
 {
     /// @brief The game has no save.
     None = 0,