refactor: re-organize code

include/Laser.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <iostream>
+#include <SFML/Graphics.hpp>
+
+using namespace std;
+using namespace sf;
+
+class Laser
+{
+public:
+	Laser();
+
+	RectangleShape& getShape() { return _laser; }
+	
+	void setInitialPosition(Vector2f position);
+
+private:
+	RectangleShape _laser;
+};
+