float_endf from endf package

[shimwell]

Description

Paul made this fab python endf package. It includes the float_endf function that we have in openmc. One key difference is that the endf package is pip installable and makes use of pybind11 to link the cpp with the python side.

Removing the local float_endf and replacing it with the float_endf from this package would be really useful for making openmc pip installable. This would help avoid some of the complicated cython useage when making the wheel

related PR for creating a conda-forge distribution for the endf package

Fixes # (issue)

Checklist

• I have performed a self-review of my own code
• I have followed the style guidelines for Python source files (if applicable)

[coveralls]

Pull Request Test Coverage Report for Build 10378180263

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• 160 unchanged lines in 24 files lost coverage.
• Overall coverage decreased (-0.2%) to 84.798%

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Files with Coverage Reduction	New Missed Lines	%
include/openmc/position.h	1	25.0%
include/openmc/endf.h	1	75.0%
include/openmc/distribution_spatial.h	1	75.0%
include/openmc/container_util.h	1	0.0%
include/openmc/material.h	1	50.0%
include/openmc/particle.h	1	0.0%
include/openmc/timer.h	1	0.0%
include/openmc/angle_energy.h	2	0.0%
include/openmc/tallies/tally.h	2	25.0%
include/openmc/openmp_interface.h	2	50.0%

Totals
Change from base Build 10185501209:	-0.2%
Covered Lines:	49506
Relevant Lines:	58381

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💛 - Coveralls