Middle-Earth Additions: Npc

Update to 1.21.8

Changed:

• Improved the trading screen layout and moved its title above the panel.
• Properly aligned and spaced shop items.
• Added Minecraft-style highlights for hovered and selected items.

Fixed:

• Purchases now update coins and received items immediately.
• Prevented delayed purchases from activating after closing the menu.
• Prevented rapid duplicate purchase requests.