David Benedict Bestseller though it is – 10 million copies and counting – it’s fair to say that “Life of Pi,” the extraordinary story of a shipwrecked 17-year-old who did (or maybe didn’t) spend 227 days at sea with no one for company but a Bengal tiger, doesn’t exactly cry out to be staged. Yet since Yann Martel’s novel (previously adapted into a 2012 film by Ang Lee) is really all about belief, theater — entirely predicated on audiences’ belief — turns out to be a potentially ideal fit.