Support for docking

[trapazza]

Hi there! First of all, thanks for bringing Dear ImGui to Unity 🥇. Fantastic work indeed.

I've been using it for the past two months flawlessly and have written a number of tools for my game. The number of tools is rapidly increasing though and I'm gonna need to handle better my screen real-estate.

I was wondering if you're planning to add the docking features from Dear ImGui? If not, I might try to do it myself if you could give some indications of where to start looking?

Thanks!

[viliwonka]

I forked it, and it has docking support, check it here

https://github.com/viliwonka/dear-imgui-unity