added Jaccard distance

[skywardfire1]

Hi guys!

My first PR to your library. I added Jaccard distance. Everything is done carefully in accordance to the best development practices.

Checklist

• [ YES ] My branch is up-to-date with development branch.
• [ YES ] Everything works and tested on latest stable Rust.
• [ YES, via neural network ] Coverage and Linting have been applied

Current behaviour

there is no jaccard distance!

New expected behaviour

now there IS the jaccard distance functionality in the library. Done with respect to the current API, and checked using a smass binary outside of the code.

Change logs

Added

Jaccard distance

[Mec-iS]

thanks. i will review this as soon as possible

[codecov]

Codecov Report

❌ Patch coverage is 27.65957% with 34 lines in your changes missing coverage. Please review.
✅ Project coverage is 44.30%. Comparing base (70d8a0f) to head (ff65a08).
⚠️ Report is 10 commits behind head on development.

Files with missing lines	Patch %	Lines
src/metrics/distance/jaccard.rs	26.31%	14 Missing ⚠️
src/ensemble/random_forest_classifier.rs	28.57%	10 Missing ⚠️
src/ensemble/base_forest_regressor.rs	33.33%	8 Missing ⚠️
src/metrics/distance/mod.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##           development     #358      +/-   ##
===============================================
- Coverage        45.59%   44.30%   -1.29%     
===============================================
  Files               93       95       +2     
  Lines             8034     8001      -33     
===============================================
- Hits              3663     3545     -118     
- Misses            4371     4456      +85     

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[Mec-iS]

please run clippy with the right flags and fix the errors: https://github.com/smartcorelib/smartcore/actions/runs/22827368229/job/66322459263#step:6:1

[skywardfire1]

Done. Pls, note, the errors encountered in already existed files, so I updated the code, which was already present.

[Mec-iS]

thanks! please add one or two tests and it is good to go 👍🏼

[Mec-iS]

Thank you. I will merge as soon as tests pass. It will be packaged in the next release.