Examples and tutorial subjects (and integration tests) of potential + frame functionality

[adrn]

Some possible use cases / integration tests:

• Bar spinning (simulation in inertial frame)
• Halo figure rotation w.r.t. static disk (simulation in inertial frame)
• Simulation in a rotating reference frame with fixed bar (simulation in non-inertial frame)
• Following MW or host galaxy as it is accelerated by a large satellite (non-inertial frame)
• Restricted three-body problem (Jupiter trojan asteroids?)
• Open cluster dynamical traceback ages (adrn - see convo with Till)