Oak Sapling (First textures of Minecraft)

Added compatibility with 25w06a snapshot. 

Changed textures:

- Cold Cow variant changed to Moobloom from Minecraft: Earth. 

- Cold Pig variant changed to Dirty Pig variant. 

- Cold Cows and Pigs was changed because previosly I've taken the old textures from old Minecraft versions and games that looks more like the textures of variants in snapshot but now I want to take the oldest textures from Minecraft and games. 

- Cold Chicken variant changed to Diamond Chicken from Minecraft 2.0 First April Fools Snapshot. 

- Warm Chicken variant was changed to Cluckshroom from Minecraft: Earth.