Adds pack/overrides/kubejs/server_scripts/waystones_policy.js which:
- Caps regular waystones at 1 per player. Per-player count is stored in
player.persistentData and decremented on break (works correctly because
restrictedWaystones = ["PLAYER"] means only owners can break).
- Bans all 16 sharestone variants. They defeat the "build transport"
intent (solo pair-teleport) and can be placed just outside a claim
for stealth proximity access.
- Bans all 16 portstone variants pending separate design review.
- Leaves warp plates and warp scrolls untouched.
Bumps to 0.17.0 so launcher re-syncs.
