What began as a gap-year adventure has become a cross-country fundraiser that has already raised thousands of dollars for cancer research. Victoria’s Mateo Berkhout, 18, is cycling from Mile 0 in Victoria to Mile 0 in St. John’s, N.L., raising money for the Terry Fox Foundation. Berkhout left the Terry Fox memorial near Beacon Hill Park on May 1 and expects to complete the journey in less than three months. As of this week, he had spent more tha…