.janno & .ssf field parsing depending on a package's Poseidon version

[nevrome]

My understanding of this mechanism is developing at a glacial speed, but today I made another breakthrough. I realized that I can replace cassava's FromField typeclass with my own. This allows to pass any desired piece of information down to the individual field parsers. For example the Poseidon version!

I think I can use this to solve some things that have been bugging me about #357.

[codecov]

Codecov Report

❌ Patch coverage is 35.32110% with 141 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.68%. Comparing base (0abb550) to head (fa035f8).
⚠️ Report is 10 commits behind head on poseidon300cols.

Files with missing lines	Patch %	Lines
src/Poseidon/Janno.hs	19.69%	2 Missing and 51 partials ⚠️
src/Poseidon/ColumnTypesJanno.hs	40.54%	12 Missing and 32 partials ⚠️
src/Poseidon/SequencingSource.hs	10.71%	0 Missing and 25 partials ⚠️
src/Poseidon/ColumnTypesSSF.hs	46.42%	2 Missing and 13 partials ⚠️
src/Poseidon/ColumnTypesUtils.hs	81.81%	0 Missing and 2 partials ⚠️
src/Poseidon/CLI/Validate.hs	50.00%	0 Missing and 1 partial ⚠️
src/Poseidon/Package.hs	80.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@                 Coverage Diff                 @@
##           poseidon300cols     #364      +/-   ##
===================================================
- Coverage            57.34%   55.68%   -1.67%     
===================================================
  Files                   33       33              
  Lines                 5228     5237       +9     
  Branches               552      632      +80     
===================================================
- Hits                  2998     2916      -82     
- Misses                1678     1689      +11     
- Partials               552      632      +80     

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