Refactor/game over screen (#468)

* Move game over (win/lose) state functions to their own file

* remove unused enum

* clang format

* Implement suggestions from @ricfehr3

* Fixing lack of highlighted button after skipping  ablind

* factorize as much game over state code as possible

---------

Co-authored-by: MathisMartin31 <mathis.martin31@gmail.com>

include/game/game_over.h

@@ -0,0 +1,29 @@
+/**
+ * @file game_over.h
+ *
+ * @brief Game Over screen state functions
+ */
+#ifndef GAME_OVER_H
+#define GAME_OVER_H
+
+/**
+ * @brief Game Over screen state initialization when losing
+ */
+void game_lose_on_init(void);
+
+/**
+ * @brief Game Over screen state initialization when winning
+ */
+void game_win_on_init(void);
+
+/**
+ * @brief Game Over screen state update
+ */
+void game_over_on_update(void);
+
+/**
+ * @brief Game Over screen cleanup, common to both losing and winning
+ */
+void game_over_on_exit(void);
+
+#endif // GAME_OVER_H