Limit battery storage duration

[atpham88]

Summary

This PR adds user-input option to limit the hour duration for battery storage.

Implementation notes

Changes in this PR to add this option:

1. electric_storage.jl: added a max_duration_hours input, default is 30 (hours), and min_duration_hours, default is 0 (hour). This defaults can be changed in ["ElectricStorage"]["max_duration_hours"] and ["ElectricStorage"]["min_duration_hours"]. For ex:

input["ElectricStorage"]["max_duration_hours"] = 8
input["ElectricStorage"]["min_duration_hours"] = 2

2. storage_constraints.jl: Add a constraint to limit battery energy capacity <= battery power rating * max_duration_hours and battery energy capacity >= battery power rating * min_duration_hours
https://github.com/NREL/REopt.jl/blob/limit_battery_energy_cap/src/constraints/storage_constraints.jl#L26

[adfarth]

@atpham88 I changed the new input name from battery_hours to max_duration_hours to indicate that it's an upper bound and not fixing the duration to a certain hours.

Could you:

• Update the CHANGELOG file with a description of these changes
• Make sure all highs tests pass (they're running now)
• Make sure all xpress tests pass by running these locally (I can show how to do this if needed!)