ox: Italian smart quotes

* ox.el (org-export-smart-quotes-alist): Added support for italian smart quotes.

lisp/ox.el

@@ -5476,6 +5476,12 @@ transcoding it."
      (secondary-closing
       :utf-8 "‘" :html "‘" :latex "\\grq{}" :texinfo "@quoteleft{}")
      (apostrophe :utf-8 "’" :html "’"))
+    ("it"
+     (primary-opening :utf-8 "“" :html "“" :latex "``" :texinfo "``")
+     (primary-closing :utf-8 "”" :html "”" :latex "''" :texinfo "''")
+     (secondary-opening :utf-8 "‘" :html "‘" :latex "`" :texinfo "`")
+     (secondary-closing :utf-8 "’" :html "’" :latex "'" :texinfo "'")
+     (apostrophe :utf-8 "’" :html "’"))
     ("no"
      ;; https://nn.wikipedia.org/wiki/Sitatteikn
      (primary-opening