Add nonlinear battery example to NonlinearProblem #790
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This is an example nonlinear problem resulting from
JuliaSimCompiler
with 33 equations whose unknowns span ~13 orders of magnitude. The solution is quite sensitive to the algorithm choice and error tolerances. 15/20 of the tested algorithms failed to solve this problem (the solution L2-norm should be ~8e-7
):cc @ChrisRackauckas