adding the game_over menu and fonction to continue the game (hide_game_over)

include/systems/game_over.h

@@ -0,0 +1,17 @@
+/*
+** EPITECH PROJECT, 2019
+** MUL_my_runner_2019
+** File description:
+** game_over
+*/
+
+#ifndef MY_RPG_GAME_OVER_H
+#define MY_RPG_GAME_OVER_H
+
+#include "engine.h"
+#include <stdbool.h>
+
+bool hide_game_over(gc_engine *engine, gc_entity *entity, gc_vector2 pos, \
+enum gc_mousekeys key);
+
+#endif //MY_RPG_GAME_OVER_H