fix: update docstrings grid plans

[fdrgsp]

Update the grid plans docstrings.

related to issue #149

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0bb0350) 98.28% compared to head (dc74fb3) 98.28%.
Report is 1 commits behind head on main.

❗ Current head dc74fb3 differs from pull request most recent head b21ee65. Consider uploading reports for the commit b21ee65 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #151   +/-   ##
=======================================
  Coverage   98.28%   98.28%           
=======================================
  Files          14       14           
  Lines         877      877           
=======================================
  Hits          862      862           
  Misses         15       15           

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