Void Echo Blade

Implement only these approved requirements: - Register the custom sword named "Void Echo Blade" ("Клинок Эхо Бездны") with 9.5 attack damage, 1.6 attack speed, and 2300 durability. - Apply omitted sword defaults: mining speed 6, mining level iron, enchantability 14, and the default iron repair tag. - Generate a static item texture representing the requested nearly black dark-purple blade, turquoise sculk-like veins, smooth end-stone guard, and centered Eye of Ender motif. - Create the void_echo_blade texture: Static 16x16-style Minecraft inventory icon of a dark violet, nearly black sword with subtle turquoise sculk-vein accents running along the blade; a smooth end-stone guard with a centered Eye of Ender motif; high-contrast pixel-art silhouette suitable for an item texture.