RuinedStructures999

* Added deterministic per-chunk structure placement so spawn decisions remain stable across reloads. * Added queued main-thread generation with a configurable structures-per-tick limit. * Added optional protection checks for protected areas when a compatible protection plugin is available. * Added configurable mob encounters with entity, count, glowing, and difficulty-scaling controls. * Added advanced custom loot handling with weighted entries, amount ranges, and enchantments. * Added persistent structure metadata, bounding boxes, generated entities, and changed-block awareness. * Added safe structure removal that restores only unchanged blocks. * Added structure regeneration through the administration command. * Added radius-limited locate results and expanded structure management commands. * Added configurable performance, protection, encounter, and difficulty settings. * Fixed empty biome lists incorrectly disabling sunken shrines and sunken graveyards. * Fixed abandoned quarries being filled with stone instead of being excavated. * Fixed surface structures being placed one block below the terrain surface. * Fixed piglin villages validating one location but generating at another location. * Fixed piglin village houses overlapping because only their centers were checked. * Fixed desert temple traps failing to activate by placing the pressure plate below the floor without a trigger path. * Fixed ruined-house containers being placed below the playable floor. * Fixed watchtower containers being placed inside the upper structure instead of on the accessible platform. * Fixed custom loot configuration failing on YAML numeric types other than Integer. * Fixed invalid custom loot materials and malformed entries from interrupting loot generation. * Fixed optional protection integration from requiring the protection plugin to be installed. * Fixed queued structure generation waiting for the persistence interval before being processed. * Fixed existing entities inside a generation area from being removed as if they were generated encounters. * Fixed stale container data being discarded when another world loads. * Fixed outdated desert biome names in the default configuration. * Fixed command metadata and permissions to include regeneration and safe structure management.