pack: v0.34.0 — bnstoolkit M0 scaffold

Ships the empty bnstoolkit companion mod (0.1.0) into the pack. The mod
loads cleanly on client and server with zero visible surface — it just
proves the deploy pipeline end-to-end so M1-M4 only have to add code,
not figure out tooling.

Per-milestone scope locked in docs/bnstoolkit-discussion-points-2026-06-07.md.

Source: http://10.16.5.102:3000/minecraft/bnstoolkit

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

pack/pack.lock.json

@@ -1,13 +1,13 @@
 {
   "$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": "0.33.0",
+  "version": "0.34.0",
   "minecraft": "1.21.1",
   "loader": {
     "type": "neoforge",
     "version": "21.1.228"
   },
-  "lockedAt": "2026-06-06T23:34:21Z",
+  "lockedAt": "2026-06-07T00:12:15Z",
   "mods": [
     {
       "source": "modrinth",