This shows the FPGA time and notifier timing, and has buttons to
start/pause/step the simulation.
The GUI also pauses DS new data notifications when paused. This could be
done globally instead by blocking NotifyNewData at the HAL level?
Add user setting for scaling on top of DPI scaling.
Add user setting for visual style (light/dark/normal).
Save window position, size, maximized state, scale, and style to ini file.
This uses Dear Imgui to provide a cross-platform integrated GUI for robot
simulation. The GUI provides fully integrated DS and joystick support so it's
not necessary to run the official DS.
