Everyone knows the composer. Verdi’s “Otello.” Rossini’s “Il Barbiere di Siviglia.” Etc. But few pay attention to the writer, the person who actually provides these great geniuses with the text for their music. Eugene Scribe, born on Dec. 24, 1791, is one of the most notable librettist in all of opera, and yet he doesn’t quite come up in conversations {…}