The Gaza prisoner-hostage exchange and ceasefire deal between Israel and Hamas is the first step towards Middle East stability, Foreign Minister Antonio Tajani said Thursday.     "The peace agreement reached today marks a crucial moment in history," said Tajani, who is also deputy premier, on X.     "It is the first major step in a long process of stabilization in the Middle East.     "The ceasefire in Gaza, the release of hostages, and the agreed-upon withdrawal of Israeli forces were the