add fps util for pxl8 in lua

src/pxl8_sdl3.c

@@ -61,9 +61,6 @@ static void* sdl3_create(pxl8_color_mode mode, pxl8_resolution resolution,
         pxl8_error("Failed to set vsync: %s", SDL_GetError());
     }
 
-    SDL_SetRenderLogicalPresentation(ctx->renderer, fb_w, fb_h,
-                                     SDL_LOGICAL_PRESENTATION_INTEGER_SCALE);
-
     ctx->framebuffer_texture = SDL_CreateTexture(ctx->renderer,
                                                   SDL_PIXELFORMAT_RGBA32,
                                                   SDL_TEXTUREACCESS_STREAMING,