feat: basic catboost support

[kjappelbaum]

• Breaking change (fix or feature that would cause existing functionality to change)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Documentation
• Developer tools
• Refactoring
• Test

Actions (for code changes)

• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Merging #234 (236c04d) into main (1c8791e) will not change coverage.
The diff coverage is n/a.

❗ Current head 236c04d differs from pull request most recent head c4c6f41. Consider uploading reports for the commit c4c6f41 to get more accurate results

@@           Coverage Diff           @@
##             main     #234   +/-   ##
=======================================
  Coverage   95.25%   95.25%           
=======================================
  Files          21       21           
  Lines        1371     1371           
=======================================
  Hits         1306     1306           
  Misses         65       65           

Flag	Coverage Δ
unittests	95.25% <ø> (ø)

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