NEW YORK (AP).- Show-biz caricaturist Al Hirschfeld immortalized the world of theater with his fluid ink-and-pen portraits while seated in a barbershop chair behind a worn century-old drafting desk in the fourth-floor studio of his Manhattan town house. Now, eight years after the celebrated artist’s death, his widow is donating the sturdy tools of his trade to the Library for the Performing Arts at Lincoln Center. “It took eight men to get the chair down” the four flights of stairs, Louise Hirschfeld Cullman, a theater historian who married Hirschfeld in 1996, said in an interview Tuesday. “I thought this library was the right place for his work,” she said. “He lived most of his life in New York. His main focus was New York City and the theater. … his personal vision and style was something I felt belonged in New York.” The artifacts were scheduled to be unveiled at a reception at the library Tuesday night. Hirscfeld made Virtually all of his drawings while he was ensconced i