Healpix pointing selection

Include methods to run the survey using healpix to select the points and granularity of the pointings - Decrease the action space

References from Eric -
> Good references for healpix:
https://healpix.sourceforge.io/
https://healpix.jpl.nasa.gov/
https://healpy.readthedocs.io/en/latest/
https://astropy-healpix.readthedocs.io/en/latest/ (the code here is less mature, I think, and I’ve never used it)
I recommend using healpix, but if you’re curious about HTM, here are some references:
http://www.skyserver.org/htm/
https://arxiv.org/abs/cs/0701164
the only python HTM library I know if is https://github.com/lsst/sphgeom