feat: export newly added functions

Author: AayushSabharwal

src/ModelingToolkit.jl

@@ -302,19 +302,19 @@ export Differential, expand_derivatives, @derivatives
 export Equation, ConstrainedEquation
 export Term, Sym
 export SymScope, LocalScope, ParentScope, GlobalScope
-export independent_variable, equations, controls, observed, full_equations, jumps
+export independent_variable, equations, controls, observed, full_equations, jumps, cost
 export initialization_equations, guesses, defaults, parameter_dependencies, hierarchy
 export structural_simplify, expand_connections, linearize, linearization_function,
        LinearizationProblem
 export solve
 
 export calculate_jacobian, generate_jacobian, generate_rhs, generate_custom_function,
-       generate_W
+       generate_W, calculate_hessian
 export calculate_control_jacobian, generate_control_jacobian
 export calculate_tgrad, generate_tgrad
-export calculate_gradient, generate_gradient
+export generate_cost, calculate_cost_gradient, generate_cost_gradient
 export calculate_factorized_W, generate_factorized_W
-export calculate_hessian, generate_hessian
+export calculate_cost_hessian, generate_cost_hessian
 export calculate_massmatrix, generate_diffusion_function
 export stochastic_integral_transform
 export TearingState