enables writing of economic models, including two region#292

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bl-young wants to merge 3 commits intomasterfrom issue_291

+63-32

Commits on May 17, 2024

skip writing flows for economic models, #291
bl-young
committed
skip some validations for economic only models; add economic models to tests
bl-young
committed
rename buildEIOModel to buildIOModel and export; incorporate adjustment for 2r models
bl-young
committed