[FIBERALLOC-26] Rewrite shuffle for PFS use case - PFS-JIRA

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This is an overarching ticket to rewrite HETDEX' shuffle for PFS.

Shuffle will identify guides stars for PFS and produce finder charts.

Specifically:

shuffle should now find and select suitable guide star candidates in the guid camera footprints
it should know about the PFI focal plane geometry (and it's much larger footprint)
deal with free position angles
all HETDEX legacy code should be removed.

is blocked by

FIBERALLOC-27 Interface to opDB to retrieve tile locations and PAs, store results in opDB

FIBERALLOC-29 Interface shuffle to appropriate PFS libraries

FIBERALLOC-30 Resolve issue of late finder chart images, i.e. where to retrieve ~ 2 Deg x 2 Deg images on the fly.

FIBERALLOC-31 Run shuffle for a representative example of tile positions in GA/GE/COS

FIBERALLOC-32 Integrate shuffle into Yabe-san’s survey simulation

FIBERALLOC-28 Update code to find guide star candidates in guide camera footprints

(1 is blocked by)