Add UI

[Mariana-rc01]

[voidbert]

I'll put ImGUI in the lib directory first, and then leave you to these changes

[voidbert]

Hi! I just added ImGUI and I was wondering if it would be better or not to put the UI class in the window namespace. I'm not seeing the ui namespace getting more classes in the future, and a namespace with a single class defeats the purpose of namespaces. What's your opinion on this?

[Mariana-rc01]

Hi! I just added ImGUI and I was wondering if it would be better or not to put the UI class in the window namespace. I'm not seeing the ui namespace getting more classes in the future, and a namespace with a single class defeats the purpose of namespaces. What's your opinion on this?

Hi! I agree with you, it makes sense. I'll go ahead and make that change now.