Add IRA-like calculations to economics module

[malcolm-dsider]

Add a simple way to estimate the impact of IRA-like tax incentives on a geothermal project:

1. Investment Tax Credit - applied to reduce CAPEX?
2. Production Tax Credit - applied to reduce OPEX and thereby reduce LCOE?

Need to account for "adders" like 10% for local content, 10% for Energy Community, etc.
Also need to account for time limits (e.g., PTC expires 10 years after it is started

[softwareengineerprogrammer]

@malcolm-dsider is this related to and/or duplicative of #169?

[malcolm-dsider]

No. Related and perhaps executed at the same time, but different calculations.

[malcolm-dsider]

Completed via PR #177