modifications for simple o cart

[anilyil]

Because the simple o cart routine is moved here from CGNS utils, I am adding the changes needed in PR: https://github.com/mdolab/cgnsutilities/pull/58 to here.

These changes let users define a custom bounding box for the simple o cart rather than just relying on the bounding box of the grid. We can also specify overset BCs on the outer faces by the optional argument useFarfield which defaults to farfield BCs but can be set to False to get overset BCs on the extruded o-cart.

Expected time until merged

few days

Type of change

• [x] Bugfix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [] Breaking change (non-backwards-compatible fix or feature)
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (no functional changes, no API changes)
• [ ] Documentation update
• [ ] Maintenance update
• [ ] Other (please describe)

Testing

Checklist

• [ ] I have run flake8 and black to make sure the Python code adheres to PEP-8 and is consistently formatted
• [ ] I have formatted the Fortran code with fprettify or C/C++ code with clang-format as applicable
• [ ] I have run unit and regression tests which pass locally with my changes
• [ ] I have added new tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation

[codecov[bot]]

Codecov Report

Merging #65 (6d210c9) into main (f63fd7c) will decrease coverage by 0.28%. The diff coverage is 75.00%.

@@            Coverage Diff             @@
##             main      #65      +/-   ##
==========================================
- Coverage   79.95%   79.66%   -0.29%     
==========================================
  Files           4        4              
  Lines         414      418       +4     
==========================================
+ Hits          331      333       +2     
- Misses         83       85       +2     

Impacted Files	Coverage Δ
pyhyp/utils.py	88.46% <75.00%> (-3.21%)	:arrow_down:

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[anilyil]

I forgot this PR was up. #66 supersedes this PR. closing.