Oak Sapling (First textures of Minecraft)

Added compatibility with 25w05a snapshot. 

 Changed textures:

- Warm Cow changed to Cow Horse texture from 2.0 April Fools verison. 

- Cold Cow changed to Wooly Cow from Minecraft: Earth. 

- Pig texture changed to develop gray texture. 

- Cherry Leaves changed to the first Pig texture bacuse it used Pig model as placeholder during development. 

- Bush and Fireflu Bush textures changed to Shrub textures. 

- Firefly particlke texture changed to Firefly from MinecraftL Story Mode. 

- Pig texture changed to remove the snout that wasn't in it's first model.

- Changed Cow and Mooshroom textures to support new models.