PORT-AU-PRINCE — Residents of Haiti’ s capital have been cleaning streets and building makeshift seating areas as the Caribbean nation prepares for their first World Cup appearance in 52 years, offering a rare moment of celebration amid the country’s ongoing turmoil. Haiti face Scotland in Boston on Saturday in their opening Group C match, marking only the second men’s World Cup appearance for the team and their first since 1974. In Port-au-Prince, where chronic electricity shortages and gang