refactor into files

src/main/cpp/quad.h

@@ -0,0 +1,12 @@
+#pragma once
+#include <glad/gles2.h>
+
+class Quad
+{
+    GLuint m_vao = 0;
+    GLuint m_vbo = 0;
+public:
+    void create();
+    void draw() const;
+    void destroy();
+};