Add separate classes for classification tasks

[amrit110]

PR Type ([Feature | Fix | Documentation | Test])

Refactor/Improvement

Short Description

• Add better class hierarchy for task classes
• Move save/load model methods to base task class
• Add model_name property to model wrappers and use that in the save function

Tests Added

tests/cyclops/tasks/test_classification.py

[mahshidaln]

Looks good!

[codecov]

Codecov Report

Merging #501 (0fc97cb) into main (cb788c2) will increase coverage by 0.33%.
Report is 1 commits behind head on main.
The diff coverage is 74.32%.

@@            Coverage Diff             @@
##             main     #501      +/-   ##
==========================================
+ Coverage   61.96%   62.30%   +0.33%     
==========================================
  Files          86       87       +1     
  Lines        8435     8454      +19     
==========================================
+ Hits         5227     5267      +40     
+ Misses       3208     3187      -21     

Files	Coverage Δ
cyclops/models/wrappers/pt_model.py	80.15% <100.00%> (+0.40%)	⬆️
cyclops/tasks/cxr_classification.py	42.59% <100.00%> (-6.64%)	⬇️
cyclops/tasks/mortality_prediction.py	32.22% <100.00%> (-0.57%)	⬇️
cyclops/utils/file.py	99.07% <ø> (ø)
cyclops/models/wrappers/sk_model.py	43.84% <80.00%> (+5.19%)	⬆️
cyclops/tasks/classification.py	81.81% <81.81%> (ø)
cyclops/tasks/base.py	84.50% <79.16%> (-3.00%)	⬇️
cyclops/models/wrappers/base.py	68.75% <20.00%> (-22.16%)	⬇️