fix: support all sklearn classes

[s0nicboOm]

1. Support artifact-type in mlflow registry from user.
2. Update docs

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.18%. Comparing base (aa3b4bb) to head (c4e1b98).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #408      +/-   ##
==========================================
+ Coverage   92.15%   92.18%   +0.03%     
==========================================
  Files          97       97              
  Lines        4782     4775       -7     
  Branches      430      429       -1     
==========================================
- Hits         4407     4402       -5     
+ Misses        278      276       -2     
  Partials       97       97              

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