Refactor/blind select screen (#461)

Refactor Blind Select Screen.

Based on #363
---------

Co-authored-by: emiyl <me@emiyl.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

include/game_variables.h

@@ -6,6 +6,8 @@
 #ifndef GAME_VARIABLES_H
 #define GAME_VARIABLES_H
 
+#include "blind.h"
+
 #include <tonc.h>
 
 #define GAME_SPEED_MIN 1
@@ -41,6 +43,12 @@ typedef struct
     int ante;
     int money;
 
+    // Blind variables
+
+    enum BlindType current_blind;
+    enum BlindType next_boss_blind;
+    enum BlindState blinds_states[NUM_BLINDS_PER_ANTE];
+
     // Options variables
 
     // BY DEFAULT IS SET TO 1, but if changed to 2 or more, should speed up all (or most) of the