Integrate with the DifferentialEquations.jl time steppers

[ChrisRackauckas]

https://paralab.github.io/Finch/dev/configuration/#Main.Finch.timeStepper-Tuple{Any}

It would be nice if it could be instead setup to generate code for the RHS of an ODEProblem and then allow for using any of the ODE solvers.

https://docs.sciml.ai/DiffEqDocs/stable/solvers/ode_solve/

For details on setting it up for this, see https://docs.sciml.ai/DiffEqDocs/stable/getting_started/ or maybe https://docs.sciml.ai/DiffEqDocs/stable/tutorials/advanced_ode_example/