Add support for motion data on SteamDeck (Steam Controller plugin)

    ControllerMotionData_t MotionData = SteamInput()->GetMotionData(ControllerHandle);
     
    // InputMotionData_t - For rotQuatX/rotQuatY/rotQuatZ/rotQuatW, the inertial measurement unit on the controller will create a quaternion
    // based on fusing the gyro and the accelerometer. This value is the absolute orientation of the controller, but it will drift on the
    // yaw axis.
    const FQuat TiltQuat(MotionData.rotQuatX, MotionData.rotQuatY, MotionData.rotQuatZ, MotionData.rotQuatW);
    const FRotator TiltRot(TiltQuat);
    const FVector TiltVector(TiltRot.Pitch, TiltRot.Yaw, TiltRot.Roll);
     
    // InputMotionData_t - Angular velocity is reported as an interpolated value between INT16_MIN and INT16_MAX where the extents are clamped
    // to ±2000 degrees per second.
    const FVector RotationRate = (FVector(MotionData.rotVelZ, MotionData.rotVelX, MotionData.rotVelY) / INT16_MAX) * 2000.f;
     
    // InputMotionData_t - Positional acceleration is reported as an interpolated value between INT16_MIN and INT16_MAX where the extents are
    // clamped to ±2G (1G = 9.80665 m/s2).
    const FVector Acceleration = (FVector(MotionData.posAccelX, MotionData.posAccelY, MotionData.posAccelZ) / INT16_MAX) * 2.f;
     
    MessageHandler->OnMotionDetected(
        TiltVector,
        RotationRate,
        FVector::ZeroVector,
        Acceleration,
           UserId
        );