Rachel Plesha

This is being reviewed by members of the NIRISS team and @camipacifici before it will be ready to be merged.

I've added the data files to the box folder `niriss_wfss_advanced`, and then they are separated in there by notebook. The notebooks expect the data in a specific directory though, not...

> > I've added the data files to the box folder `niriss_wfss_advanced`, and then they are separated in there by notebook. The notebooks expect the data in a specific directory...

Thanks @mgough-970 ! I was actually just working to make a requirements file now.

@camipacifici this is ready for review now whenever there is time