State ITC Amount [v3.13.15]

[softwareengineerprogrammer]

Description

1. Addresses State ITC Amount NatLabRockies/GEOPHIRES-X#507
2. Adds State Investment Tax Credit Amount parameter that is passed to corresponding SAM parameter itc_sta_amount

TODO

1. Update SAM-EM SAM Parameter mapping table in documentation: 12f7282

Testing & Verification

1. Unit tests added: N/A
2. Unit tests updated: test_state_itc_amount
3. Manual testing:
   1. Manually tested & self-reviewed
   2. 🚧 Web interface

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Change Checklist

Observe the following checklist items before and after merging, as applicable.

Before merging:

1. I certify that I am a human and I have manually verified the correctness of the changes in this PR.
2. Add a CHANGELOG entry if your change includes a new version: 847c904, 0980776

After merging:

1. Push tag(s) to GitHub: git push fork refs/tags/v3.13.15: https://github.com/softwareengineerprogrammer/GEOPHIRES/releases/tag/v3.13.15
2. Post a change announcement to the GEOPHIRES Change Announcements Discussion See Well integrity parameterization; Drawdown Parameter Schedule; Input params CSV unit and comment parsing; State ITC Amount; SAM-EM Other Incentives and One-time Grants Etc fix [v3.14] NatLabRockies/GEOPHIRES-X#502

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Self-reviewed in #168