This PR adds a new method to Game which allows advancing the game loop by a certain amount of time while the engine is paused. By default it assumes one frame to be ~16 ms, but it can be controlled while calling stepEngine
The idea is to allow easy frame by frame inspection of the game. It can even be added to FlameStudio as part of the start/pause buttons on the toolbar.
https://user-images.githubusercontent.com/33748002/233453501-b9f90d49-1834-4f0f-9536-77629cfcadbc.mp4
