Example of Benders decomposition for structural optimization of dependent stochastic model

[slwu89]

@adolgert I inteded to bring this up on one of our Friday meetings but there was a recent article with associated repo here (https://github.com/mitchopt/Combining-Optimization-and-Simulation-Using-Logic-Based-Benders-Decomposition) describing optimization of planning (number of machines, flow layout, etc) where each feasible solution is evaluated via DES. I need to go back and read the paper more carefully, but it should be a nice example.

[slwu89]

The repo says it needs Gurboi, I suspect HiGHS has the necessary stuff to add cuts during the solve, but will need to examine that before I am sure.