feat: Added it_IT translation (#1200)

frontend/app_flowy/packages/appflowy_editor/lib/l10n/intl_it_IT.arb

@@ -1,35 +1,35 @@
 {
   "@@locale": "it-IT",
-  "bold": "",
+  "bold": "Grassetto",
   "@bold": {},
-  "bulletedList": "",
+  "bulletedList": "Elenco puntato",
   "@bulletedList": {},
-  "checkbox": "",
+  "checkbox": "Casella di spunta",
   "@checkbox": {},
-  "embedCode": "",
+  "embedCode": "Incorpora codice",
   "@embedCode": {},
-  "heading1": "",
+  "heading1": "H1",
   "@heading1": {},
-  "heading2": "",
+  "heading2": "H2",
   "@heading2": {},
-  "heading3": "",
+  "heading3": "H3",
   "@heading3": {},
-  "highlight": "",
+  "highlight": "Evidenzia",
   "@highlight": {},
-  "image": "",
+  "image": "Immagine",
   "@image": {},
-  "italic": "",
+  "italic": "Corsivo",
   "@italic": {},
-  "link": "",
+  "link": "Collegamento",
   "@link": {},
-  "numberedList": "",
+  "numberedList": "Elenco numerato",
   "@numberedList": {},
-  "quote": "",
+  "quote": "Cita",
   "@quote": {},
-  "strikethrough": "",
+  "strikethrough": "Barrato",
   "@strikethrough": {},
-  "text": "",
+  "text": "Testo",
   "@text": {},
-  "underline": "",
+  "underline": "Sottolineato",
   "@underline": {}
 }