🌈 style: Refactor paper parsing methods

[AndPuQing]

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[AndPuQing]

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.23810% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 56.61%. Comparing base (e9c79f5) to head (5f96ace).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #35      +/-   ##
==========================================
+ Coverage   56.39%   56.61%   +0.21%     
==========================================
  Files          33       33              
  Lines        1016     1021       +5     
==========================================
+ Hits          573      578       +5     
  Misses        443      443              

Flag	Coverage Δ
unittests	56.61% <95.23%> (+0.21%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
backend/app/app/source/AAAI.py	44.44% <100.00%> (-1.99%)	⬇️
backend/app/app/source/Arxiv.py	61.11% <100.00%> (ø)
backend/app/app/source/base.py	40.51% <100.00%> (+3.81%)	⬆️
backend/app/app/source/NIPS.py	45.83% <66.66%> (-2.17%)	⬇️