Add Rare Albino Variants for All Mobs

I would love to see very rare albino versions of existing mobs in Minecraft. These would be special visual variants of normal mobs with white or pale textures and red or light-colored eyes — similar to how real albino animals look.

They wouldn't have to be stronger or weaker than regular mobs, but finding one would feel exciting — like discovering a shiny Pokémon. Albino mobs could appear with a very low chance, for example 1 in 1000 spawns or even rarer.

This idea could bring more variety, surprise, and fun to exploring the world — especially for collectors and long-time players who enjoy rare features.

Optional: Albino variants could maybe drop a unique item or grant an advancement when discovered, but even without that, they'd still be cool!