Add a unit test for nearly overlapping polygons

[mcara]

Add a unit test that is known to fail with the current code when trying to intersect almost perfectly overlaping polygons resulting in a MalformedPolygonError. The test is marked with XFAIL. Improvements to the code should result in this test not XFAIL-ing.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (bb9a3c5) to head (9b98db0).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #329   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines           10        10           
=========================================
  Hits            10        10           

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