Get/Set angular velocity

[pellevoice]

You can currently get velocity via GetAbsVelocity GetLocalVelocity and set velocity via Teleport.
But there's nothing for getting/setting angular velocity, which would have its uses for a lot of physics-based stuff.

For example, you'd want to spawn some debris-pieces and give them a randomized spin for flair.

Community maps also rely on physics to move stuff around, such as vehicles.
phys_thruster has been the main way to go about this, but having the ability to set angular velocity on stuff without relying on pre-positioned entities would still be great.