Make papers into modules, instead of structs; add StartupCostsFormulation

src/model/formulations/Gar1962/pwlcosts.jl

@@ -5,7 +5,7 @@
 function _add_production_piecewise_linear_eqs!(
     model::JuMP.Model,
     g::Unit,
-    formulation::Gar1962,
+    formulation::Gar1962.PwlCosts,
 )::Nothing
     eq_prod_above_def = _init(model, :eq_prod_above_def)
     eq_segprod_limit = _init(model, :eq_segprod_limit)

src/model/formulations/Gar1962/structs.jl

@@ -10,4 +10,10 @@ Formulation described in:
     of Electrical Engineers. Part III: Power Apparatus and Systems, 81(3), 730-734.
 
 """
-struct Gar1962 <: PiecewiseLinearCostsFormulation end
+module Gar1962
+
+import ..PiecewiseLinearCostsFormulation
+
+struct PwlCosts <: PiecewiseLinearCostsFormulation end
+
+end