Run and add a simple simulation showing the differences between analytic and numeric tractions.

[dcelisgarza]

https://github.com/dcelisgarza/EasyDD/blob/3dcca314d659ab3923ab5392e91660da311f6c67/src/wip/DanielCelisGarza/Accurate_evaluation_of_dislocation_tractions/paper/main.tex#L408-L408