prsint command line interface

[larsbuntemeyer]

This pr will add a command line interface prsint so the pressure interpolation can be done on files from the command line.

[codecov-commenter]

Codecov Report

Merging #53 (737ff5e) into master (2be4706) will decrease coverage by 3.47%.
The diff coverage is 7.89%.

@@            Coverage Diff             @@
##           master      #53      +/-   ##
==========================================
- Coverage   57.94%   54.47%   -3.48%     
==========================================
  Files          23       25       +2     
  Lines         944     1006      +62     
==========================================
+ Hits          547      548       +1     
- Misses        397      458      +61     

Flag	Coverage Δ
unittests	54.47% <7.89%> (-3.48%)	⬇️

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Impacted Files	Coverage Δ
pyremo/cli.py	0.00% <0.00%> (ø)
pyremo/prsint/_defaults.py	0.00% <0.00%> (-100.00%)	⬇️
pyremo/prsint/cli.py	0.00% <0.00%> (ø)
pyremo/core/utilities.py	18.18% <18.18%> (ø)
pyremo/prsint/core.py	100.00% <100.00%> (ø)

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[larsbuntemeyer]

should we click for (testing) the command line interface?

[larsbuntemeyer]

should we click for (testing) the command line interface?

we stay with argparse for now, the cli is quite simple and it works for now.