Add character Air rotation,

[Neurai-ai]

I was plying around with excessive air movements and noticed the character doesn't face the direction when moving in the air.

Modifying AALSBaseCharacter::UpdateInAirRotation(float DeltaTime) like the following seemed to work well.

void AALSBaseCharacter::UpdateInAirRotation(float DeltaTime)
{
    if (RotationMode == EALSRotationMode::VelocityDirection || RotationMode == EALSRotationMode::LookingDirection)
    {
        // Velocity / Looking Direction Rotation
        SmoothCharacterRotation({0.0f, LastVelocityRotation.Yaw, 0.0f}, 0.0f, 5.0f, DeltaTime);
    }
    else if (RotationMode == EALSRotationMode::Aiming)
    {
        // Aiming Rotation
        SmoothCharacterRotation({0.0f, AimingRotation.Yaw, 0.0f}, 0.0f, 15.0f, DeltaTime);
        InAirRotation = GetActorRotation();
    }
}