Add isequal dispatch on Pyramid

[felixcremer]

This tests isequal on all levels separately this should be faster and also more correct. This will also catch if two pyramids are from the same data but with different aggregation functions.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.75%. Comparing base (b5ff435) to head (7756dd7).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #91      +/-   ##
==========================================
+ Coverage   72.10%   72.75%   +0.64%     
==========================================
  Files           4        4              
  Lines         337      345       +8     
==========================================
+ Hits          243      251       +8     
  Misses         94       94              

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