[Enhancement]: Add more astrophysical models

[taylorbell57]

Instrument

Light curve fitting (Stages 4-6)

What is your suggestion?

The astrophysical models that we mentioned during our meeting today that we'd like to at least investigate adding to Eureka are:

• [ ] catwoman (for asymmetric transits)
• [ ] spiderman (for phase curves and eclipse mapping); may not be worthwhile given how extremely time-consuming it is. If we do add it, we should sparsely compute it and interpolate in time
• [x] starry (for transits, eclipse mapping, and phase curves. This depends on pymc3; I have already started adding starry while working on Issue #265)
• [ ] eigencurves/eigenmapping (Megan's code for eclipse mapping)

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

[taylorbell57]

FYI, I now have well functioning and modular code for starry+pymc3 that just needs tests and documentation. I'll try to have a PR submitted for that before the end of the month in prep for the MIRI ERS observations