Add umfpack and pardiso solvers

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[codecov]

Codecov Report

Merging #35 (f85bb88) into main (3a62122) will decrease coverage by 0.33%.
The diff coverage is 72.22%.

@@            Coverage Diff             @@
##             main      #35      +/-   ##
==========================================
- Coverage   89.66%   89.33%   -0.33%     
==========================================
  Files          35       35              
  Lines        3754     3808      +54     
==========================================
+ Hits         3366     3402      +36     
- Misses        388      406      +18     

Files Changed	Coverage Δ
setup.py	0.00% <ø> (ø)
tdgl/solver/runner.py	85.93% <51.72%> (-5.24%)	⬇️
tdgl/solver/solve.py	75.27% <68.75%> (-1.05%)	⬇️
tdgl/finite_volume/operators.py	93.89% <87.50%> (-0.60%)	⬇️
tdgl/solution/solution.py	88.28% <100.00%> (+0.07%)	⬆️
tdgl/solver/options.py	88.13% <100.00%> (+4.41%)	⬆️