Add optimal electrode MIP example from CS 524

[stevehaworth02]

Adding optimal EEG electrode selection via mixed-integer programming example from Prof. Ferris's CS 524 course.
This notebook demonstrates electrode subset optimization using GAMSPy with cost models and symmetry constraints.

[mabdullahsoyturk]

Hi @stevehaworth02. Thanks for your contribution. There are a few things missing:

• You didn't commit the data files. You try to load files like electrodes.csv, usefulness_real.csv, and features.csv but they are not there.
• It would be nice if you can install the dependencies that your notebook needs in the first cell. For example:

! pip install scikit-learn, matplotlib etc.