v0.1.0 - Initial release

• Patch-based target world expansion as players approach the edge.
• Terrain copying from donor world with configurable patch size.
• Queue-based generation with per-tick limits and deduped patch states.
• Optional copy engine selection: AUTO | BUKKIT | WORLDEDIT.
• Movement safety: blocks entering not-yet-generated patches.
• Teleport safety: delays teleport until destination patch is ready.
• Dynamic boundary updates around generated area.
• End-portal progression trigger on advancement.
• Per-world patch storage with world recreation detection and reset.
• Automatic patch-grid migration when patch size changes.