Core - Implement common approach to animation helpers

[Kexanone]

When merged this pull request will:

• Add ACE_AnimationHelperCompartment as a base class for animation helper compartments.
• Add ACE_CarriableAnimationHelperComponent as a component for making ACE_AnimationHelperCompartment carriable.
• Add ACE_AnimationTools as interface with Configs/ACE/ACE_AnimationHelpers.conf for registering helpers to it.
• Add ACE_ContinuousLoiterCommand for ACE_AnimationHelperCompartment-based gestures.
• Add SCR_CompartmentAccessComponent::ACE_GetInVehicle and SCR_CompartmentAccessComponent::ACE_GetOutVehicle (getting out is animated unlike with ACE_MoveOutVehicle).
• Fix SCR_CompartmentAccessComponent::ACE_MoveOutVehicle did not work when character was still getting in.
• Extend SCR_RemoveCasualtyUserAction for loading carried characters in vehicles.