ucon#165: true generic support for pydantic integration

[withtwoemms]

addresses #165

[codecov-commenter]

Codecov Report

❌ Patch coverage is 40.00000% with 30 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.17%. Comparing base (019cfb4) to head (43047b2).

Files with missing lines	Patch %	Lines
ucon/pydantic.py	44.18%	23 Missing and 1 partial ⚠️
ucon/core.py	14.28%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #166      +/-   ##
==========================================
- Coverage   89.17%   88.17%   -1.00%     
==========================================
  Files          14       14              
  Lines        2392     2435      +43     
  Branches      488      493       +5     
==========================================
+ Hits         2133     2147      +14     
- Misses        152      180      +28     
- Partials      107      108       +1     

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