Merge branch 'whit-master-patch-95162' into 'master'

Added quick overview for readme

See merge request EIC/tracking/guide_to_tracking!1

README.md

 # Guide To Tracking
 
+## Overview
+
+Currenlty, track finding and fitting is based around using [ACTS](https://acts.readthedocs.io) with the geometry constructed via [DD4hep](https://dd4hep.web.cern.ch/dd4hep/).
+
+(To be completed...)