Support Enum

[gab23r]

Fixes #1768, #1767

Not really familiar to the codebase, so review carefully

[codecov]

Codecov Report

Attention: Patch coverage is 70.58824% with 5 lines in your changes missing coverage. Please review.

Project coverage is 93.20%. Comparing base (812b2a8) to head (c3a3715).
Report is 144 commits behind head on main.

Files with missing lines	Patch %	Lines
pandera/engines/polars_engine.py	70.58%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1798      +/-   ##
==========================================
- Coverage   94.28%   93.20%   -1.08%     
==========================================
  Files          91      120      +29     
  Lines        7013     9173    +2160     
==========================================
+ Hits         6612     8550    +1938     
- Misses        401      623     +222     

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[cosmicBboy]

thanks @gab23r ! reviewing this now... in the mean time, you can run the pre-commit hooks to fix linter

[apsocarras]

For what it's worth, Polars still has Enum marked as an unstable feature:

https://docs.pola.rs/api/python/stable/reference/api/polars.datatypes.Enum.html#polars.datatypes.Enum

Thanks for the small patch -- likewise too unfamiliar with the codebase to review it, but I may try it out in some analysis workflows.

[cosmicBboy]

Thanks for the contribution @gab23r !