By Andrea Shalal WASHINGTON (Reuters) – The U.S. government is seeking to free up half of $7 billion in frozen Afghan central bank assets on its soil to help the Afghan people, pending a judicial decision, while holding the rest to satisfy lawsuits against the Taliban from victims of terrorism, the White House said on Friday. President Joe Biden signed an executive order declaring a national emergency to deal with the threat of a deepening economic collapse in Afghanistan, setting the wheels in motion for a complex resolution of competing interests in the Afghan assets. The move comes hours be…