GEOPY-2587: Add dip_direction to list of supported variables by plate_sweep

[domfournier]

GEOPY-2587 - Add dip_direction to list of supported variables by plate_sweep

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.19%. Comparing base (14a2fbf) to head (9030828).
⚠️ Report is 5 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #314      +/-   ##
===========================================
+ Coverage    91.16%   91.19%   +0.03%     
===========================================
  Files          114      114              
  Lines         6200     6203       +3     
  Branches       758      758              
===========================================
+ Hits          5652     5657       +5     
+ Misses         347      346       -1     
+ Partials       201      200       -1     

Files with missing lines	Coverage Δ
simpeg_drivers/plate_simulation/sweep/uijson.py	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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