Feature request: reconsider how operation and maintenance are passed to ProFAST

[jaredthomas68]

Reconsider how operation and maintenance are passed to ProFAST

There is some question about whether we should use the 'maintenance' option in pf.set_params or use pf.add_fixed_cost to include the operation and maintenance costs in ProFAST inside the CustomFinancialModel. I think this question is more about how the user wants to include O&M in the model. We may want to support multiple approaches and implement them as projects need them.

Proposed solution

We chose to just use the 'maintenance' option in pf.set_params for now

Alternatives considered

We could use the pf.add_fixed_cost method instead.

Additional context

See discussion in PR #355