Add Mending 2 and nerf Mending 1

Adjust the mechanics of Mending 1 to require more experience levels to raise durability, and introduce a new enchantment, Mending 2. Implement a unique acquisition method akin to trial chambers to make it less easily obtainable. When an armor piece is enchanted with Mending, enable the option to place it in an enchanting table to convert current experience levels into durability, in addition to the standard effects of Mending 1, albeit with a slight enhancement. Introduce difficulty in obtaining these enchantments to provide a challenge for seasoned Minecraft players in late-game scenarios.