Arc-Length method

[Aminofa70]

Dear Developers @KnutAM @koehlerson ,

Thanks for the great package. I'm writing to kindly ask if the package has Arc-Length method or any plan to add it.

I'm using your package connected to Ferrite, but I face a problem where the solution has pull-in and snap-through/snap-back instabilities and Newton-Raphson fails.

Thanks in advance.