feat(admin): expand/collapse all sidebar groups with scrollable nav

Co-authored-by: Cursor <[email protected]>

src/messages/it.json

@@ -1010,6 +1010,8 @@
 				"import": "Importa",
 				"settings": "Impostazioni",
 				"backToSite": "Torna al sito",
+				"expandAll": "Apri tutte",
+				"collapseAll": "Chiudi tutte",
 				"hotelManagementPanel": "Pannello di gestione hotel",
 				"rankLabel": "Grado {rank}",
 				"hubNewsMedia": "Notizie e media",