Create a lightweight plugin for Paper 1.21.11 that adds sitting, laying, crawling and spinning commands. Players can sit on any block using /sit without falling through textures. /lay makes player lie down horizontally. /crawl enables swimming pose on land. /spin makes player rotate smoothly at 10 degrees per tick. Auto-sit on stairs should be enabled. Messages should use §a[VibeMine] §f format. No ArmorStand entities - use player poses and swimming mechanics instead to prevent falling through blocks. Commands should work with shift to stand up. Plugin must be compatible with Paper 1.21.11 only, no dependencies.