MapManager-Core

1. Added Multiverse-Core 5 support for world creation, importing, loading, teleportation, and deletion. 2. Added /init <world>, which reapplies MapManager’s default settings to a loaded world. 3. Improved world importing with better directory, name, and duplicate checks; newly generated chunks now retain VoidGen terrain. 4. Improved /world, including teleportation, spawn-point setup, public status, and world alias handling. 5. Fixed map member permissions, player UUID lookups, and leftover permission nodes after deleting a map. 6. Added a map-directory API for other plugins to locate map storage folders. 7. Added Chinese and English documentation covering installation, permission groups, commands, and development integration. 8. Added support for version 26.1 and later.