feat: support pydantic data model

[hanxiao]

No description provided.

[codecov]

Codecov Report

Merging #50 (9ea2c18) into main (b7e5ce7) will increase coverage by 0.06%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##             main      #50      +/-   ##
==========================================
+ Coverage   82.70%   82.76%   +0.06%     
==========================================
  Files          70       70              
  Lines        3318     3331      +13     
==========================================
+ Hits         2744     2757      +13     
  Misses        574      574              

Flag	Coverage Δ
docarray	82.76% <88.88%> (+0.06%)	⬆️

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Impacted Files	Coverage Δ
docarray/document/mixins/pydantic.py	83.72% <87.50%> (+7.05%)	⬆️
docarray/array/mixins/pydantic.py	82.35% <100.00%> (ø)
docarray/document/__init__.py	70.37% <100.00%> (ø)
docarray/proto/io/__init__.py	91.52% <100.00%> (ø)

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