Move main.c to src directory

src/main.c

@@ -0,0 +1,31 @@
+#include "colour.h"
+#include "drop_area.h"
+#include "window.h"
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_events.h>
+#include <SDL2/SDL_render.h>
+#include <SDL2/SDL_video.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+#define WINDOW_WIDTH 1280
+#define WINDOW_HEIGHT 720
+
+int main(void) {
+  window_t window = {0};
+
+  if (!open_window(&window, "Window", WINDOW_WIDTH, WINDOW_HEIGHT,
+                   (colour_t){.abgr = 0xffffffff})) {
+    return EXIT_FAILURE;
+  }
+
+  drop_area_t area = {0};
+  init_drop_area(&window, &area, (render_rect_t){10, 10, 1260, 600},
+                 (colour_t){.abgr = 0xff000000});
+
+  run_window_loop(&window);
+
+  close_window(&window);
+
+  return EXIT_SUCCESS;
+}