Create: Adapted

- Restored rendering of vertical Mechanical Belts.
- Fixed vertical belt pulleys and shafts rotating in the wrong direction.
- Fixed belt movement direction with both Flywheel and the compatibility renderer.
- Restored Flywheel visuals for moving contraptions, trains, packages, and contraption actors.
- Improved lighting on moving contraptions and windmill sails.
- Fixed flickering, duplicate rendering, and z-fighting when Flywheel is enabled.
- Fixed duplicate rendering of moving mechanisms, train bogeys, packages, and virtual block entities.
- Fixed a client crash when changing the Flywheel backend.
- The public external-assets build continues to use `flywheel:off` by default until accelerated rendering is fully configured.