Αdd test for quad area function

[ashjbarnes]

Modified gitignore to include .env instead of env (was failing to ignore .env on my local dev env)

Added a new testing function called 'test_grid_generation' which will test the gridgen tools. So far only tests the quad area and angle between functions. Replaces tests_trivial.py

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +3.03% 🎉

Comparison is base (7a557bb) 10.72% compared to head (16c877b) 13.75%.

❗ Current head 16c877b differs from pull request most recent head 737ab49. Consider uploading reports for the commit 737ab49 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #61      +/-   ##
==========================================
+ Coverage   10.72%   13.75%   +3.03%     
==========================================
  Files           2        2              
  Lines         429      429              
==========================================
+ Hits           46       59      +13     
+ Misses        383      370      -13     

see 1 file with indirect coverage changes

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