demonstrate OPD/WFE drift scenarios

[JarronL]

Create an example notebook and possibly some convenience functions to demonstrate WFE drift scenarios during a telescope slew using the OTE_WFE_Drift_Model class. The idea would be to create a time series of thermal, frill, and IEC delta OPDs for a sequence of telescope slews. Each OPD can then be used to generate unique PSFs via the calc_psf function.

• For the most part, this has already been completed in the pynrc TSO example. Just need to port to webbpsf_ext.
• Maybe incorporate OTE_WFE_Drift_Model more directly into NIRCam and MIRI subclasses?
• This likely will not work with the polynomial coefficient implementation.
• Make sure that the OTE_WFE_Drift_Model class still works as intended in the event there have been updates to OTE_Linear_Model_WSS.