WASHINGTON (Reuters) – The Biden administration on Thursday issued a raft of new sanctions aimed a punishing Russia for its invasion of Ukraine, with targets including several yachts linked to Russian President Vladimir Putin, a yacht brokerage and a cellist it says acts as a middleman for the Russian leader. The United States and other Western countries have imposed unprecedented sanctions on Russia’s economy since the Feb. 24 invasion, including the country’s central bank and major financial institutions. In his State of the Union address in March, Biden said the United States would work to …