pack: KubeJS Waystones policy (1-per-player + ban share/portstones)

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.

pack/overrides/kubejs/server_scripts/waystones_policy.js

@@ -0,0 +1,93 @@
+// Brass & Sigil — Waystones placement policy
+//
+// Rules:
+//   - Regular waystones (6 stone variants): 1 per player. Forces players to
+//     build actual transport infrastructure (trains/roads/canals) for
+//     long-distance routes instead of waystone-spamming.
+//   - Sharestones (16 colors): banned. Pair-teleport between solo-placed
+//     sharestones defeats the "build transport" intent, and a sharestone
+//     placed just outside someone's claim gives an unrestricted teleport-
+//     adjacent vector.
+//   - Portstones (16 colors): banned pending separate design discussion.
+//   - Warp plates: not restricted (single-block teleport pad; revisit if
+//     it becomes a workaround).
+//   - Warp scrolls / warp stones: untouched (consumable / cooldown-bound).
+//
+// Per-player count lives in player.persistentData.bnsWaystoneCount.
+// Decrement on break works because waystones-common.toml has
+// restrictedWaystones = ["PLAYER"] -- only the owner can break their own
+// waystone, so breaker == owner in normal play.
+
+const WAYSTONE_CAP = 1;
+
+const REGULAR_WAYSTONES = new Set([
+    'waystones:waystone',
+    'waystones:mossy_waystone',
+    'waystones:sandy_waystone',
+    'waystones:blackstone_waystone',
+    'waystones:deepslate_waystone',
+    'waystones:end_stone_waystone',
+]);
+
+// Build the colored-block ban list once instead of typing 32 strings.
+const COLORS = [
+    'white', 'orange', 'magenta', 'light_blue', 'yellow', 'lime',
+    'pink', 'gray', 'light_gray', 'cyan', 'purple', 'blue',
+    'brown', 'green', 'red', 'black',
+];
+const BANNED_BLOCKS = new Set();
+COLORS.forEach(c => {
+    BANNED_BLOCKS.add(`waystones:${c}_sharestone`);
+    BANNED_BLOCKS.add(`waystones:${c}_portstone`);
+});
+
+// Helper: replace the just-placed block with air and refund the item.
+function refund(event, blockId) {
+    event.block.set('minecraft:air');
+    if (event.player) {
+        event.player.give(Item.of(blockId));
+    }
+}
+
+BlockEvents.placed(event => {
+    const blockId = event.block.id;
+    const player = event.player;
+
+    // Skip non-player placements (dispensers, mob events) -- nothing to refund.
+    if (!player) return;
+
+    if (BANNED_BLOCKS.has(blockId)) {
+        refund(event, blockId);
+        player.tell(Text.red(
+            'That block is disabled. Use a regular Waystone (1 per player) ' +
+            'and build transport between distant bases.'
+        ));
+        return;
+    }
+
+    if (REGULAR_WAYSTONES.has(blockId)) {
+        const data = player.persistentData;
+        const current = data.getInt('bnsWaystoneCount');
+        if (current >= WAYSTONE_CAP) {
+            refund(event, blockId);
+            player.tell(Text.red(
+                `You already have ${WAYSTONE_CAP} waystone. Break your existing one ` +
+                `to relocate, or build infrastructure to reach distant bases.`
+            ));
+            return;
+        }
+        data.putInt('bnsWaystoneCount', current + 1);
+    }
+});
+
+BlockEvents.broken(event => {
+    const blockId = event.block.id;
+    if (!REGULAR_WAYSTONES.has(blockId)) return;
+    const player = event.player;
+    if (!player) return;  // explosion / world clear -- accept count drift, rare
+    const data = player.persistentData;
+    const current = data.getInt('bnsWaystoneCount');
+    if (current > 0) {
+        data.putInt('bnsWaystoneCount', current - 1);
+    }
+});

pack/pack.lock.json

@@ -1,7 +1,7 @@
 {
   "$schema": "Brass-and-Sigil pack.lock.json - generated, do not edit by hand unless you know what you are doing",
   "name": "Brass and Sigil",
-  "version": "0.16.3",
+  "version": "0.17.0",
   "minecraft": "1.21.1",
   "loader": {
     "type": "neoforge",