Nametags Drop Upon Death

Hello! Losing a treasured companion can feel like a stab to the heart, especially since upon death, mobs vanish into thin air, never to be seen again. When a named mob dies, it should drop the nametag that the player used on it. This nametag cannot be renamed or reused, and its display name will change to that of its fallen owner. The item's new name will also appear when it is placed in an item frame.

E.g. if a wolf named Blueberry died, it would drop a nametag labeled "Blueberry." This nametag would function as a mere tribute to the lost wolf and would have no practical use except if the player wished to display it in an item frame.