Data module refactorization + new Optimizer module

[gbg141]

• data module cleaning and refactorization. Now datasetsmodule is within data
• New optimizer module that manages optimizers and schedulers, full compatibility with torch.optim

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Codecov Report

Attention: Patch coverage is 76.92308% with 9 lines in your changes missing coverage. Please review.

Project coverage is 61.95%. Comparing base (a091a44) to head (468cd95).
Report is 1 commits behind head on main.

Files	Patch %	Lines
topobenchmarkx/optimizer/optimizer.py	66.66%	8 Missing ⚠️
topobenchmarkx/optimizer/base.py	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #75      +/-   ##
==========================================
+ Coverage   61.83%   61.95%   +0.11%     
==========================================
  Files          95       98       +3     
  Lines        2361     2389      +28     
==========================================
+ Hits         1460     1480      +20     
- Misses        901      909       +8     

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