Fowl Play

Unfortunately not many new features this time, I've been a bit busy. The 1.20.1 version might be somewhat late as I have to get the multiloader setup working

• Add black-backed gull variant
• Add sparrow idle animations
• Add new penguin swimming bubbles
• Add dynamic flapping animation to ravens
• Decrease sparrow model size
• Update hawk wing model
• Reduce default bird call distances
• Migrate to SmartBrainLib