RCAL-762: Simulate APT program

[PaulHuwe]

Code to simulate a stack of roman images as specified by an APT program file.
Addition of a Gaia catalog generation script.

[codecov]

Codecov Report

Attention: Patch coverage is 10.00000% with 27 lines in your changes are missing coverage. Please review.

Project coverage is 90.69%. Comparing base (725b7cb) to head (7508f12).
Report is 10 commits behind head on main.

❗ Current head 7508f12 differs from pull request most recent head 5e407df. Consider uploading reports for the commit 5e407df to get more accurate results

Files	Patch %	Lines
romanisim/ris_make_utils.py	10.00%	27 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #107      +/-   ##
==========================================
- Coverage   92.44%   90.69%   -1.75%     
==========================================
  Files          16       16              
  Lines        1509     1623     +114     
==========================================
+ Hits         1395     1472      +77     
- Misses        114      151      +37     

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[schlafly]

This looks great. I've left a few minor comments inline. I'd also suggest we rename the script "gaia_cat" to "romanisim-make-catalog" to be more parallel to the existing romanisim scripts installed into PATH.

[schlafly]

Looks good to me, merging.