refactoring microphysics

[codecov[bot]]

Codecov Report

Merging #102 (b9c828d) into main (d923423) will decrease coverage by 0.01%. The diff coverage is 100.00%.

:exclamation: Current head b9c828d differs from pull request most recent head bae31c0. Consider uploading reports for the commit bae31c0 to get more accurate results

@@            Coverage Diff             @@
##             main     #102      +/-   ##
==========================================
- Coverage   96.68%   96.68%   -0.01%     
==========================================
  Files          33       33              
  Lines        1267     1266       -1     
==========================================
- Hits         1225     1224       -1     
  Misses         42       42              

Files	Coverage Δ
src/microphysics/microphysical_schemes.hpp	100.00% <100.00%> (ø)
src/microphysics/microphysics.hpp	100.00% <100.00%> (ø)
src/opacity/Giants/freedman.hpp	0.00% <ø> (ø)
src/snap/thermodynamics/thermodynamics.hpp	100.00% <ø> (ø)
tests/test_microphysics.cpp	100.00% <100.00%> (ø)