SKYLINE independent vehicle physics

Runtime: Ammo.js (Bullet compiled to JavaScript), distributed through
ammojs-typed@1.0.6. The original PolyTrack Worker/WASM is not used.
https://github.com/kripken/ammo.js
https://github.com/giniedp/ammojs-typed
ammojs-typed package metadata declares MIT for its wrapper/type definitions.

Ammo.js runtime license (zlib):
Copyright (c) 2011 ammo.js contributors

This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
   claim that you wrote the original software. If you use this software
   in a product, an acknowledgment in the product documentation would be
   appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.

See https://github.com/kripken/ammo.js/blob/main/AUTHORS for contributors.

The game's raycast-vehicle integration, authored track collision meshes,
controls, stage parameters and validation harness are independent project code.
Matching recorded research constants is not a claim of engine/game parity.