RE Case: PV + Battery + Hydrogen

[dguittet]

Addresses issue:

RE Collaborative case study #207

Code for industry case study with placeholder data for PV capacity factors, Loads, Reserves, NG prices

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[codecov]

Codecov Report

Patch coverage: 92.32% and project coverage change: +0.11 🎉

Comparison is base (5f38880) 89.76% compared to head (1612d1d) 89.87%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #215      +/-   ##
==========================================
+ Coverage   89.76%   89.87%   +0.11%     
==========================================
  Files          74       77       +3     
  Lines        8853     9257     +404     
==========================================
+ Hits         7947     8320     +373     
- Misses        906      937      +31     

Impacted Files	Coverage Δ
..._studies/renewables_case/solar_battery_hydrogen.py	90.63% <90.63%> (ø)
...s/renewables_case/solar_battery_hydrogen_inputs.py	100.00% <100.00%> (ø)
...newables_case/tests/test_solar_battery_hydrogen.py	100.00% <100.00%> (ø)

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[Xinhe-Chen]

This PR looks good to me.