pack: tune Waystones config + bump to 0.16.1

Ships an override of waystones-common.toml under pack/overrides/
defaultconfigs/ so first-run installs (clients + fresh servers) get the
intended defaults. NeoForge auto-copies defaultconfigs/<file> into
config/<file> on first run only -- player-tweaked configs after that
are preserved across pack updates.

The only override vs mod-default in this commit:
- spawnInVillages: REGULAR -> DISABLED

Everything else stays at mod default, which already gives the security
posture we want:
- defaultVisibility = ACTIVATION  -> each player must physically visit
  a waystone before they can teleport TO it. Solves the "player B
  teleports into player A's base" concern without a hard per-player
  placement cap (which v21.x dropped).
- restrictedWaystones = [PLAYER]  -> only owners can edit their own
  waystones.
- allowedVisibilities = []        -> no player UI can create global
  waystones; OPs use the /waystone command for server-public ones.

Wild waystones (in the open world, not villages) stay on -- they're
public-good fast travel, not tied to bases.

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": "0.16.0",
+  "version": "0.16.1",
   "minecraft": "1.21.1",
   "loader": {
     "type": "neoforge",