Ajoute src sdl2

sdl2.c

+#include "sdl2.h"
+void sdl_init() {
+  int const width = 1280;
+  int const height = 720;
+  context = (SDLContext){NULL, NULL, .width = 0, .height = 0};
+  if (SDL_Init(SDL_INIT_VIDEO)) {
+    return;
+  }
+
+  SDL_Window *window =
+      SDL_CreateWindow("Sokoban", SDL_WINDOWPOS_CENTERED,
+                       SDL_WINDOWPOS_CENTERED, 1280, 720, SDL_WINDOW_SHOWN);
+  if (!window) {
+    return;
+  }
+  SDL_Renderer *renderer =
+      SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
+  context = (SDLContext){
+      .window = window, .renderer = renderer, .width = width, .height = height};
+}
+void sdl_quit() {
+  SDL_DestroyWindow(context.window);
+  SDL_DestroyRenderer(context.renderer);
+  context.window = NULL;
+  context.renderer = NULL;
+  SDL_Quit();
+}

sdl2.h

+#pragma once
+#include <SDL2/SDL.h>
+typedef struct SDLContext {
+  SDL_Window *window;
+  SDL_Renderer *renderer;
+  int width;
+  int height;
+} SDLContext;
+/* @brief 
+ * Initialise une variable global `context` de type SDLContext
+ *
+ * Si il y a erreur pendant l'intialisation:
+ *  context.window = NULL
+ *  ou 
+ *  context.renderer = NULL
+ *
+ * Les deux cas sont à testé !
+ * 
+ */
+void sdl_init();
+/**
+ * nettoie la variable global context 
+ */
+void sdl_quit();