Add missing EnvState features

[jcurtis2]

Adding various EnvState features:

• Longitude
• Latitude
• Altitude
• env_state_ppb_to_conc
• env_state_conc_to_ppb
• env_state_air_molar_dens
• env_state_sat_vapor_pressure
• env_state_change_water_volume

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.02%. Comparing base (1490a37) to head (fde7138).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #462      +/-   ##
==========================================
+ Coverage   90.81%   91.02%   +0.20%     
==========================================
  Files          55       55              
  Lines        2569     2629      +60     
  Branches      144      144              
==========================================
+ Hits         2333     2393      +60     
  Misses        163      163              
  Partials       73       73              

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