Programmer Art Fix

This update has fixed critical issues of Zombified Piglin and Leaves with Sodium mod, and removed some textures to minimize modifications to the original Programmer Art assets. These removed textures would be later moved into the addon Classic Improved.

Changes

• Fixed: Zombified Piglin no longer has black pixels at its right ear
• Fixed: Changed textures of all Leaves to ensure they look as expected with the Sodium mod
• Oak Hanging Sign item
• Sign & Hanging Sign items of Birch, Acacia, and Dark Oak
• Checked checkbox, now consistent with unchecked checkbox

Removals

• Sugar Cane item
• Door items of Spruce, Birch, Jungle, Acacia, and Dark Oak
• Oak Sign item
• CEM texture for Zombie Pigman