Add universal_ner

[elronbandel]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 92.15686% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 89.03%. Comparing base (a38cfb2) to head (a3b61b2).

Files	Patch %	Lines
src/unitxt/loaders.py	71.42%	2 Missing ⚠️
src/unitxt/operators.py	75.00%	1 Missing ⚠️
src/unitxt/span_lableing_operators.py	96.55%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #622      +/-   ##
==========================================
+ Coverage   89.01%   89.03%   +0.01%     
==========================================
  Files          88       90       +2     
  Lines        8091     8141      +50     
==========================================
+ Hits         7202     7248      +46     
- Misses        889      893       +4     

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