Add Pendulum DT support

[theunkn0wn1]

Adds a proxy type for pendulum.DateTime, allowing pendulum DTs to be used in Pydantic base models.

closes #112

depends on #111

[theunkn0wn1]

Tests are failing due to deprecation warnings being thrown in tests out of scope of this PR.
The Lint task is failing due to some seemingly out of scope error in MyPy.
Do I need to fix these?

[hramezani]

Just merged #113
The CI problem will probably be fixed by rebasing on top of the main.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (634487f) 100.00% compared to head (1bf0d91) 100.00%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #110   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           10        11    +1     
  Lines          665       685   +20     
  Branches       166       169    +3     
=========================================
+ Hits           665       685   +20     

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[theunkn0wn1]

Converted to draft as #111 needs to merge first.

[Apilny]

It looks like the blocking PR has been merged, will this feature be implemented in the near future? My team and I would appreciate support for Pendulum DT, thanks!

[theunkn0wn1]

PR rebased and made ready for review.

[Apilny]

Hey there, just wanted to bump this pr, would love the support, thanks!

[theunkn0wn1]

@sydney-runkle and/or @yezz123 can I get a review on this PR please?

(tagged since you previously merged PRs in this repo and/or self-assigned themself to this PR)

[yezz123]

LGTM 🎉

Thanks @theunkn0wn1 🙌🏻 , I made just some small changes and a json-schema test