refactor and feat: Add parsing ability for NOMAD datafiles and breakout tests in test_pdf.py into respective files

[cadenmyers13]

closes #206

All testing for the pdf module was in a singular function called test_pdf.py. This breaks out the test into their respective files. I Also reorganized where some deprecated functions were located within the file to help with removal of these tests later.

[cadenmyers13]

Below is the only new thing added. Everything else is just reorganization.

[cadenmyers13]

Also new testdata file

[codecov]

Codecov Report

❌ Patch coverage is 72.05882% with 95 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.40%. Comparing base (a9eae82) to head (4d7cbfd).
⚠️ Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
tests/test_pdfcontribution.py	39.02%	50 Missing ⚠️
tests/test_pdfgenerator.py	16.66%	45 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #207       +/-   ##
===========================================
+ Coverage   71.63%   82.40%   +10.77%     
===========================================
  Files          25       27        +2     
  Lines        3437     4103      +666     
===========================================
+ Hits         2462     3381      +919     
+ Misses        975      722      -253     

Files with missing lines	Coverage Δ
tests/test_constraint.py	98.30% <100.00%> (+1.33%)	⬆️
tests/test_fitrecipe.py	99.86% <100.00%> (+0.09%)	⬆️
tests/test_parameterset.py	96.96% <100.00%> (+2.23%)	⬆️
tests/test_pdfparser.py	100.00% <100.00%> (ø)
tests/test_profile.py	99.55% <100.00%> (+0.21%)	⬆️
tests/test_recipeorganizer.py	99.53% <100.00%> (-0.16%)	⬇️
tests/test_pdfgenerator.py	16.66% <16.66%> (ø)
tests/test_pdfcontribution.py	39.02% <39.02%> (ø)

... and 6 files with indirect coverage changes

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[cadenmyers13]

@sbillinge ready for review. Shall we do a patch release? This is essentially a bug fix