A simple to use class that enables your CharacterBody3D to handle stairs properly.

Mainly tested with the Jolt physics engine and cylinder colliders, not guaranteed to work well with anything else - but try it!

1. Make your character controller extend StairsCharacter instead of CharacterBody3D.
2. Ensure your character's collider is named 'Collider'.
3. Every frame, set DesiredVelocity to the desired direction of movement.
4. Call MoveAndStairStep() instead of calling MoveAndSlide().
5. Done!

Ensure your character collider's margin value is set low - at most 0.01. Anything higher might cause snags. If you find that you're still snagging on ledges, lower it some more.