Proposed modification of AdaptableInterval

Hi all,

Recently AdaptableInterval were added to Hipparchus/Orekit and they’re great. They can speed up analytical propagations and avoid missed detections essentially. However, physically the intelligence to create one depends on the propagation direction. So my proposition is to modify the signature of computeInterval to take also a boolean isForward for example. In order to preserve API we could have a default implementation using true (rather arbitrarily although I would expect it to be the most used case).