[Feature] Add silhouette loss

[yl-1993]

No description provided.

[codecov-commenter]

Codecov Report

Attention: 43 lines in your changes are missing coverage. Please review.

Comparison is base (3a6b403) 58.68% compared to head (7129445) 58.49%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #147      +/-   ##
==========================================
- Coverage   58.68%   58.49%   -0.19%     
==========================================
  Files         185      186       +1     
  Lines       11608    11659      +51     
==========================================
+ Hits         6812     6820       +8     
- Misses       4796     4839      +43     

Flag	Coverage Δ
unittests	58.49% <15.68%> (-0.19%)	⬇️

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Files	Coverage Δ
xrmocap/model/loss/builder.py	100.00% <100.00%> (ø)
xrmocap/model/loss/silhouette_loss.py	12.24% <12.24%> (ø)

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