Draft: SciFi hit resolution study

Algorithm to study SciFi hit resolution. Mask one layer and do tracking with other 11 layers, then calculate the DOCA value between the track and the nearest hit on the masked layer. The hit resolution could be obtained by fitting the distribution of DOCA values. The related talk: https://indico.cern.ch/event/1275422/contributions/5531525/attachments/2696866/4680655/Hit_Resolution_YaZhao.pdf