refactor: use GellMann-Nishijima rule in particle mod

[redeboer]

Closes #372

[redeboer]

@spflueger Seems to work, only the tests fail because there's something wrong with the way the rule is used in the post init check of Particle.

[codecov]

Codecov Report

Merging #552 (3d13ff8) into master (e7fc5ab) will decrease coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #552      +/-   ##
==========================================
- Coverage   86.27%   86.23%   -0.05%     
==========================================
  Files          22       22              
  Lines        3636     3625      -11     
  Branches      885      884       -1     
==========================================
- Hits         3137     3126      -11     
  Misses        321      321              
  Partials      178      178              

Flag	Coverage Δ
unittests	86.23% <100.00%> (-0.05%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/expertsystem/amplitude/_graph_info.py	81.96% <100.00%> (ø)
src/expertsystem/amplitude/helicity.py	85.62% <100.00%> (-0.05%)	⬇️
src/expertsystem/amplitude/kinematics.py	84.09% <100.00%> (-0.12%)	⬇️
src/expertsystem/reaction/__init__.py	83.05% <100.00%> (ø)
src/expertsystem/reaction/_system_control.py	89.72% <100.00%> (ø)
src/expertsystem/reaction/combinatorics.py	90.79% <100.00%> (-0.19%)	⬇️
src/expertsystem/reaction/conservation_rules.py	92.12% <100.00%> (-0.03%)	⬇️
src/expertsystem/reaction/particle.py	93.22% <100.00%> (-0.71%)	⬇️
src/expertsystem/reaction/quantum_numbers.py	100.00% <100.00%> (ø)

[spflueger]

GJ