The first residential buildings at Strathmore Square, a huge transit-oriented development in North Bethesda, have opened. Courtesy of Strathmore Square Royale, one of a pair of new apartment buildings at Strathmore Square. Ravel and Royale — twin “biophilic-designed and musically-inspired” apartment communities totaling 220 units — opened this month. Fivesquares Development partnered with Apartment Investment and Management Co. on the…