Add positional input visualization test #77
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The test listens for mouse, touch (finger) and pen events and draws them on the screen. Each input type has a different look, and each
SDL_*IDgets a different colour. Just some rectangles as drawing text is hard.This new test uses SDL3 main callback functions. It's an interesting idea, similar to how we delegate running the main thread to the iOS display link/callback thingy in o!f.
Sample video of how the test looks when interacting with a touchpad and tablet:
out.mp4