Pasaeta de "include-what-you-use" per arreglar els includes

Renombrats alguns fitxers per consistencia

source/screen.h

@@ -1,11 +1,15 @@
 #pragma once
 
-#include <SDL2/SDL.h>
-#include <vector>
-#include "asset.h"
-#include "input.h"
-#include "notify.h"
-#include "utils.h"
+#include <SDL2/SDL_blendmode.h>  // for SDL_BlendMode
+#include <SDL2/SDL_rect.h>       // for SDL_Rect
+#include <SDL2/SDL_render.h>     // for SDL_Renderer, SDL_Texture
+#include <SDL2/SDL_stdinc.h>     // for Uint32
+#include <SDL2/SDL_video.h>      // for SDL_Window
+#include <string>                // for basic_string, string
+#include "utils.h"               // for color_t
+class Asset;
+class Input;
+class Notify;
 
 #define SCREEN_FILTER_NEAREST 0
 #define SCREEN_FILTER_LINEAL 1