Americans finally have a chance to see what all the fuss is about over Eimear McBride’s “A Girl Is a Half-formed Thing.” Its success has the makings of a minor literary legend. The Irish writer’s debut novel languished for nine years without a publisher until it was finally released last year by a tiny new press in Norwich, England: Gallery Beggar, “a company specifically set-up to act as a sponsor to writers who have struggled to either find or retain a publisher.” Soaring from that humble beginning, “A Girl Is a Half-formed Thing” went on to win the Kerry Group Irish Novel of the Year Award, the Goldsmiths Prize, the Desmond Elliott Prize and the Baileys Women’s Prize — about $100,000 in prize money.