Refactored functionality into separate files

img/handler.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <fstream>
+
+
+void saveImage(const char* filename, unsigned char* framebuffer, int width, int height) {
+    std::ofstream imageFile(filename, std::ios::out | std::ios::binary);
+    imageFile << "P6\n" << width << " " << height << "\n255\n";
+    for (int i = 0; i < width * height * 3; i++) {
+        imageFile << framebuffer[i];
+    }
+    imageFile.close();
+}