added ZDC SiPM-on-tile reconstruction benchmark

...ar_forward/analysis/analysis_zdc_sipmontile_particles.cxx

...rks/far_forward/analysis/gen_zdc_sipmontile_particles.cxx

...far_forward/analysis/make_plots_zdc_sipmontile_hexplit.py

benchmarks/far_forward/config.yml

benchmarks/far_forward/hexplit/hexplit.py

...arks/far_forward/options/zdc_sipmontile_reconstruction.py

benchmarks/far_forward/run_zdc_sipmontile.sh