adds jokers 6-16. Extract hand type detection logic from hand_get_type to be used by jokers as well

include/game.h

@@ -72,4 +72,11 @@ enum HandType
 void game_init();
 void game_update();
 
+// Utility functions for other files
+typedef struct CardObject CardObject; // forward declaration, actually declared in card.h
+CardObject **get_hand_array(void);
+CardObject **get_played_array(void);
+int get_hand_top(void);
+int get_played_top(void);
+
 #endif // GAME_H