Issue - Option to allow user to include their own FEM engine

[jyzhao]

I noticed that there is a recent updates saying: "Option to allow user to include their own FEM engine". May I ask how does this work and is there any documents for this? Many thanks!

[fmk]

we have updated the documentation to include a section. as we wrote the code it makes sense to us. however, we know that for someone not sure of what to do the documention is possibly incomplete. let us know.

https://nheri-simcenter.github.io/quoFEM-Documentation/common/user_manual/usage/desktop/quoFEM/FEM.html