The co-director of a Maryland-based research group who claims to have damaging information about Hunter Biden has been charged with arms trafficking, sanctions violations and acting as an unregistered agent for China, according to a federal indictment unsealed on Monday. In an eight-count indictment, prosecutors in the Southern District of New York accused Gal Luft, a dual U.S.-Israeli citizen, of violating the Arms Export Control Act and the Foreign Agents Registration Act in brokering arms deals between Chinese companies, Iran and countries in the Middle East. Mr. Luft, promoted by…