Jolt pinball physics in Godot

Motivation on my [holodeck project](https://spectra.video/w/4rmfheZx7AmtpY7SWjnY8D) has been wearing thin, so I took a detour to experiment with pinball physics. The bumpers and slingshots use only physical motion to propel the ball away - no magical impulses applied via script! Unfortunately, I found Godot's built-in physics to not be suitable right now, even with continuous detection. A launched ball would immediately get stuck partially inside the playfield boundary collider! Fortunately, swapping out to use the [Jolt physics engine](https://github.com/jrouwe/JoltPhysics) was painless thanks to [godot-jolt](https://github.com/godot-jolt/godot-jolt) (available in the Asset Library), and the integration with Godot has been absolutely seamless so far.