Enchantment Library Standalone

Changed

• Network Payloads: Replaced legacy enchantment selection via integer IDs with custom network payloads (EnchSelectionPayload), improving server-client communication reliability.
• Concurrency: Improved thread-safety and concurrency handling within block entities and configuration caches.

Fixed

• Enchantment Point Overflow: Resolved point calculation bugs in the block entity. Separated max level and max points cap logic, adding a guard against invalid high levels to prevent overflow.
• XP Cost Overflow: Mitigated a "Zero-Cost Upgrade" exploit where XP costs for extremely high-level enchantments would overflow integer limits, safely migrating to long arithmetic.