Volume projection bounds

[anilyil]

Purpose

This PR adds optional bounds to the parametric coordinates used during volume projections. Same additions can be done for the surface and curve projections as well. @lamkina and @hajdik can follow the template here.

Expected time until merged

No rush

Type of change

• [ ] 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 #63 (daed9fd) into main (17a3867) will increase coverage by 0.37%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #63      +/-   ##
==========================================
+ Coverage   52.53%   52.91%   +0.37%     
==========================================
  Files           5        5              
  Lines        1616     1629      +13     
==========================================
+ Hits          849      862      +13     
  Misses        767      767              

Files Changed	Coverage Δ
pyspline/pyVolume.py	42.38% <100.00%> (+1.58%)	:arrow_up:

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