RainApricot Spawn Notification (for Pixelmon)

Summary of This Update 🔧 Core Configuration System Enhancement

1. New Configurable Detection Range Default Value: 120 blocks (previously hardcoded 150 blocks) Adjustable Range: 10-500 blocks Unified Application: All notification types use the same detection range
2. New Independent Toggle Controls ✅ Zygarde Cell/Core Notification Toggle (enableZygardeNotifications) ✅ Master Ball Reward Chest Notification Toggle (enableMasterChestNotifications) ✅ Legendary Den Spawn Notification Toggle (enableDenNotifications) ✅ Retained original Pokémon notification toggles (Shiny, Legendary, BOSS) 🚀 Compatibility Update ✅ Updated to support Pixelmon 9.3.9 - Latest version compatibility ✅ Fixed API changes and deprecated methods ✅ Maintained backward compatibility with previous versions