feat(cube): add cube function

inc/cube.hpp

@@ -0,0 +1,27 @@
+#ifndef CUBE_HPP
+#define CUBE_HPP
+
+#include "vbo.hpp"
+#include "ebo.hpp"
+#include "vao.hpp"
+#include "shader.hpp"
+#include "texture.hpp"
+#include "camera.hpp"
+
+class Cube
+{
+private:
+  VBO vbo;
+  EBO ebo;
+  VAO vao;
+
+  Camera &camera;
+  Shader shader;
+  Texture texture;
+
+public:
+  Cube(Camera &camera);
+  void loop(int width, int height);
+};
+
+#endif