Critical Developer First Time Experience: Improve Docs: "Must call ImGuiGodot.ImGuiGD.ToolInit(); before use"

[jasonswearingen]

Godot will hard-crash if you try to use IMGuiGodot without first calling ImGuiGodot.ImGuiGD.ToolInit(); IIRC I mentioned this before to the devs. This should be explicitly called before anything else.

Please add a line in the README docs explaining this. I don't know the intricies of ImGui/ImGuiGodot to understand the reasons why calling .ToolInit() is required, or when it might not be. (it is required in my use case). Otherwise I'd write a doc PR myself.