SAM-EM Carbon Price Support

[softwareengineerprogrammer]

Description

1. Support for carbon price calculations for SAM Economic Models (SAM Economic Models do not calculate carbon revenue NatLabRockies/GEOPHIRES-X#458)
2. Fix support for suffixed currency conversions e.g. USD/tonne → USD/lb

Testing & Verification

1. Unit tests added:
   1. example_SAM-single-owner-PPA-6_carbon-revenue
2. Unit tests updated: Describe existing unit tests that were updated, if any.
3. Manual testing: Describe any additional manual testing steps that were performed, such as running the change on a pre-existing data set you own.

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TODO

1. Add cash flow line items (price, revenue, lbs, etc.)
2. Documentation
   1. SAM-EM docs
      1. https://github.com/NatLabRockies/GEOPHIRES-X/blob/d9d40b9c76a95466ba82dda9e25501f75ec4308b/docs/SAM-Economic-Models.md?plain=1#L55
   2. example_SAM-single-owner-PPA-6_carbon-revenue description
3. README example list entry
4. Trim example_SAM-single-owner-PPA-6_carbon-revenue parameter comments
5. Minor version bump
   1. potential change in SAM-EM results due to carbon calculations
   2. suffixed currency conversion fix
6. USD/tonne unit fix
7. CARBON REVENUE PROFILE in result

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Change Checklist:

Observe the following checklist items if your change includes a new version (see versioning notes and version management docs).

Before merging:

1. Add a CHANGELOG entry (example). RST Template:

M.m.P: `TITLE <https://github.com/NREL/GEOPHIRES-X/pull/PR-NUMBER>`__ | `release <https://github.com/NREL/GEOPHIRES-X/releases/tag/vM.m.P>`__

After merging:

1. Push tag(s) to GitHub: git push origin refs/tags/vM.m.P
2. Post a change announcement to the GEOPHIRES Change Announcements Discussion (example). Markdown template:

M.m.p: [TITLE](https://github.com/NREL/GEOPHIRES-X/pull/PR-NUMBER) | [release](https://github.com/NREL/GEOPHIRES-X/releases/tag/vM.m.P)

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Self-reviewed in #142

[softwareengineerprogrammer]

Break into separate capacity payment method