Attempt to add Bash / Shell translation

[illusional]

Currently only works for command tools

Relates to:

• translate to bash #26

[codecov-commenter]

Codecov Report

Merging #28 into master will increase coverage by 0.13%.
The diff coverage is 64.22%.

@@            Coverage Diff             @@
##           master      #28      +/-   ##
==========================================
+ Coverage   52.75%   52.88%   +0.13%     
==========================================
  Files          60       62       +2     
  Lines       10496    10617     +121     
==========================================
+ Hits         5537     5615      +78     
- Misses       4959     5002      +43     

Impacted Files	Coverage Δ
...anis_core/translationdeps/supportedtranslations.py	81.81% <20.00%> (-12.63%)	⬇️
janis_core/translations/bash.py	63.96% <63.96%> (ø)
janis_core/tests/test_translation_bash.py	100.00% <100.00%> (ø)
janis_core/tool/tool.py	70.09% <100.00%> (ø)

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[mr-c]

Cool! We looked into doing this for CWL, but I'm happy to see it happen here instead