Suggestion: having FPS and other performance indicators in 3d/global_illumination demo

[joseph-sch]

Which demo project is affected:

3d/global_illumination

Description:

The demo specifies in the labels of each option through which one can cycle "fastest / fast / slow". I think it would be valuable to have an indication of the frames per second (FPS) and other "debug" information like the add-on https://github.com/godot-extended-libraries/godot-debug-menu provides (activated by the F3 key).

Minimal info:

Extended info:

[Calinou]

Integrating the debug menu add-on would mean committing quite a lot of code that isn't specific to the demo, so I'd prefer to keep the demo project as minimal as possible. Most demos are intended to showcase a minimal implementation example, as opposed to being a complete template project.

I'd prefer we work on moving the debug menu add-on to core instead, so that you can use it in every demo project without having to commit additional code to each demo.