Refactoring: Project structure, sprite stairs & fog masks rendering fix

scripts/test_pyboy.py

@@ -0,0 +1,14 @@
+from pyboy import PyBoy
+
+def main():
+    pyboy = PyBoy('hello_iso.gb', window='null', cgb=False)
+    # Tick a few frames to let the map render
+    for _ in range(60 * 2):
+        pyboy.tick()
+        
+    pyboy.screen.image.save('hello_iso_gb.png')
+    pyboy.stop()
+    print("Screenshot saved to hello_iso_gb.png")
+
+if __name__ == "__main__":
+    main()