add quit command

src/dusksdl2/display/scene/renderscene.c

@@ -6,6 +6,7 @@
  */
 
 #include "renderscene.h"
+#include "display/overworld/renderoverworld.h"
 
 renderscenecallback_t RENDER_SCENE_CALLBACKS[SCENE_COUNT] = {
   [SCENE_INITIAL] = {
@@ -15,9 +16,9 @@ renderscenecallback_t RENDER_SCENE_CALLBACKS[SCENE_COUNT] = {
   },
   
   [SCENE_OVERWORLD] = {
-    .init = NULL,
+    .init = renderOverworldInit,
     .draw = NULL,
-    .dispose = NULL
+    .dispose = renderOverworldDispose
   },
 };