feat!: rework header files

inc/core/vao.hpp

@@ -0,0 +1,27 @@
+#ifndef VAO_HPP
+#define VAO_HPP
+
+#include <stddef.h>
+
+#include "glad/glad.h"
+
+class VAO
+{
+ private:
+  unsigned int id;
+
+ public:
+  VAO();
+  ~VAO();
+
+  void bind();
+  void unbind();
+
+  void setAttributePointer(GLuint index, GLuint size, GLenum type,
+                           GLsizei stride, const void* offset);
+  void drawElement(GLenum mode, GLsizei count, GLenum type,
+                   const void* indices);
+  void drawArray(GLenum mode, GLint first, GLsizei count);
+};
+
+#endif