DUBLIN — Ireland will do “everything we can” to free an Irish citizen who has been confined for nearly five months in a U.S. detention camp in Texas, Prime Minister Micheál Martin vowed Tuesday. The high-profile case of Seamus Culleton — who was seized by agents with Immigration and Customs Enforcement (ICE) in September as he left a Home Depot hardware store in Boston — is complicating Ireland’s hopes of keeping relations with Washington upbeat ahead of Martin’s planned St. Patrick’s Day visit