Add printable Enum

CopiumEngine/src/copium/core/Vulkan.cpp

@@ -16,7 +16,7 @@ namespace Copium
   void Vulkan::Initialize()
   {
     instance = std::make_unique<Instance>("Copium Engine");
-    window = std::make_unique<Window>("Copium Engine", 1920, 1080, Window::Mode::Windowed);
+    window = std::make_unique<Window>("Copium Engine", 1920, 1080, WindowMode::Windowed);
     device = std::make_unique<Device>();
     swapChain = std::make_unique<SwapChain>();