MVSI - Moog's Voyager Structures Integrated

Fixed

• Crash on load with NeoForge and Forge: the mod_compat_replace structure processor was registered directly into the already-frozen vanilla registry during mod construction, which those loaders reject. It is now registered through the mod loading registration event. (Fabric was unaffected.)
• Villagers now spawn in the large cart and barn structures — their villager jigsaws pointed at a structure pool that does not exist, so no villagers were placed.