write gryphn surface creation util for MacOS

include/gryphn/gryphn.h

@@ -1,4 +1,5 @@
 #pragma once
+#define GRYPHN_INCLUDE
 #include <platform/gryphn_platform_include.h>
 #include <core/instance/init/gryphn_init.h>
 #include <core/instance/gryphn_instance.h>

include/gryphn/utils/gryphn_glfw_util.h

@@ -0,0 +1,24 @@
+#pragma once
+#ifndef GRYPHN_INCLUDE
+#error "Must inclue gryphn.h before using this file"
+#endif
+#ifndef _glfw3_h_
+#error "Must include glfw before using this file"
+#endif
+#ifndef _glfw3_native_h_
+#error "Must include glfwnative before using this file"
+#endif
+
+#ifdef GN_PLATFORM_MACOS
+#ifndef GLFW_EXPOSE_NATIVE_COCOA
+#error "Must define GLFW_EXPOSE_NATIVE_COCOA on macos"
+#endif
+
+gnReturnCode gnCreateGLFWWindowSurface(struct gnWindowSurface_t* windowSurface, struct gnInstance_t* instance, GLFWwindow* window) {
+    gnMacOSWindowSurfaceInfo surfaceCreateInfo = {
+        .window = (NSWindow*)glfwGetCocoaWindow(window)
+    };
+    return gnCreateMacOSWindowSurface(windowSurface, instance, surfaceCreateInfo);
+}
+
+#endif