Flying Hostile Entity Spawn Egg

Implement only these approved requirements: - Create a hostile entity using the fixed simple_flying model. - Use the default dimensions: width 0.9 and height 1.4. - Use the default health 20, movement speed 0.25, attack damage 2, armor 0, and tracking range 8. - Use the pig vanilla sound family. - Configure hostile archetype default goals and occasional group spawning behavior. The entity has no natural spawning unless spawn settings are specified. - The simple_flying model is visual-only; generate it as a stationary/standard limited entity representation without aerial navigation or ranged projectile behavior. - Create the flying_hostile_entity texture: A menacing fantasy flying creature with a dark withered body, glowing pale eyes, ragged wing-like silhouettes, and subtle purple-black magical accents; Minecraft-style pixel art entity texture. - Create the flying_hostile_spawn_egg texture: A Minecraft-style spawn egg for a dark flying hostile creature, colored charcoal black and deep purple with pale glowing speckles.