Include era5 fluxes

[ashjbarnes]

Modify the data table and the setup_era5 function to include the short & long wave flux terms

[codecov]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (68646e4) 61.02% compared to head (70db369) 60.36%.
Report is 5 commits behind head on main.

Files	Patch %	Lines
regional_mom6/regional_mom6.py	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #91      +/-   ##
==========================================
- Coverage   61.02%   60.36%   -0.67%     
==========================================
  Files           3        3              
  Lines         544      550       +6     
==========================================
  Hits          332      332              
- Misses        212      218       +6     

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