By Alasdair Pal and Uditha Jayasinghe COLOMBO (Reuters) – Sri Lanka appointed a new prime minister on Thursday, as its embattled president seeks a way out of the country’s worst economic crisis since independence that has sparked widespread protests. Ranil Wickremesinghe, a political veteran who has been prime minister of the island nation five times before, must try to address financial chaos and heal political divisions as he sets out to form a coalition government. “We are facing a crisis, we have to get out of it,” Wickremesinghe told Reuters as he left a temple in the main city of Colombo…