feat: integral and differential cls

[nstarman]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 92.15686% with 8 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (main@9ab4806). Click here to learn what that means.

Files	Patch %	Lines
src/vector/_utils.py	40.00%	3 Missing ⚠️
src/vector/_d2/builtin.py	88.88%	2 Missing ⚠️
src/vector/_d3/builtin.py	92.30%	2 Missing ⚠️
src/vector/_d1/builtin.py	94.44%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #38   +/-   ##
=======================================
  Coverage        ?   89.30%           
=======================================
  Files           ?       23           
  Lines           ?      898           
  Branches        ?        0           
=======================================
  Hits            ?      802           
  Misses          ?       96           
  Partials        ?        0           

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