ayynoxs map pack: versions and changes

Changes from the review of 0.4.1:

• Map sharing is off by default and chosen per server: /wp sync on (or the setting) turns it on. When a server can pass shares on, the pack says so once in chat.
• Waypoints arrive only through private messages to the player (commands.message.display.incoming); the marker in public chat does nothing.
• Shared chunks are taken only for the player's current level, a real layer and within 2048 blocks of the player; shared waypoints stop at 1000 per world. Also: the world map is drawn like a map item again (one block per cell), which is cheaper while dragging. Built for Horizon nightly 6475f62 (2026-11-04).