Add: support validation for `glEnable(GL_DEBUG_OUTPUT)` - (crashed on MacOS)

[Challanger524]

glGetIntegerv(GL_NUM_EXTENSIONS, ...): https://stackoverflow.com/questions/70545636/is-there-a-way-to-check-if-a-platform-supports-an-opengl-function

[Challanger524]

// extension: (for vendor) debug output
if (GLEW_KHR_debug)
{
	ASSERT(glfwExtensionSupported("GL_KHR_debug") == GLFW_TRUE);
	ASSERT(glewIsSupported       ("GL_KHR_debug") == GL_TRUE);
	ASSERT(glDebugMessageCallback != nullptr);

	GLCall(glEnable(GL_DEBUG_OUTPUT));
	GLCall(glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS));
	GLCall(glDebugMessageCallback(GlDebugMessage_cb, nullptr));
	//GLCall(glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, nullptr, GL_TRUE));
}