ML model for e/pi separation in the BIC

**Is your feature request related to a problem? Please describe.**
Add a benchmark to generate trained ML models for e/pi separation in the BIC.

**Describe the solution you'd like**
A solution that does not affect the previous code and incorporates the requested feature, by doing this, the model will not depend on future changes in geometry.

**Describe alternatives you've considered**
Add a model manually, but this makes the model dependent on the geometry, and even the slightest change to it will render the model useless.

**Additional context**