LPD-69624 Adds description for list command

Author: anthony-chu

scripts/cli/lec.sh

@@ -114,6 +114,7 @@ _printHelpAndExit() {
 		  stop                                Stop a Composer project
 		  clean                               Stop a Composer project and remove Docker volumes
 		  exportData                          Export container data for a Composer project
+		  list                                List entities of a various types
 		  remove                              Completely tear down and remove one or more Composer projects
 		  share [--export]                    Save a Composer workspace for sharing. The "--export" flag exports the container data before saving the workspace.
 		  update [--unstable]                 Check for updates to Composer and lec. The "--unstable" flag updates to latest master branch.