Add code to job/ app to accept Hot Thermal Storage

[zolanaj]

Please check if the PR fulfills these requirements

• [x] CHANGELOG.md is updated
• [x] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce?

Update job/ app to include HotThermalStorage code

Addresses issue https://github.com/NREL/REopt_API/issues/298