feat(#37): agglomerative, dbscan, gmm for numerics.csv, simple plots

[h1alexbel]

ref #37

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PR-Codex overview

This PR introduces new clustering algorithms (Agglomerative, DBSCAN, GMM) and updates existing KMeans clustering with improved data visualization features like saving cluster members to .txt files.

Detailed summary

• Added Agglomerative, DBSCAN, and GMM clustering algorithms
• Updated KMeans clustering with enhanced data visualization
• Introduced a function to save cluster members to .txt files

The following files were skipped due to too many changes: steps/dbscan_numerical.py

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[h1alexbel]

@rultor merge

[rultor]

@rultor merge

@h1alexbel OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@h1alexbel Done! FYI, the full log is here (took me 13min)