Merge pull request 'pack: v0.28.0 - Steam n Rails + Copycats+/Aero weight' (#46) from feature/v0.28.0-rails-and-aero-bridge into main

Adds two mods on top of v0.27.0:

  - Create: Steam 'n' Rails 0.2.0+neoforge-mc1.21.1 (stable). The
    official Steam 'n' Rails team skipped 1.21.1, so this is the
    "Porters of Railways" community port — actively maintained,
    310k downloads on the beta line and 0.2.0 just hit stable.
    Brings train QoL: track tools, semaphores, conductor cap,
    smokestacks, narrow-gauge tracks, etc.

  - Copycats+ aeronautics weight 1.1.1. Small interop mod so
    copycat blocks contribute weight to Create: Aeronautics
    contraptions instead of being treated as massless. ~15KB.

All deps satisfied by mods already in the pack (Create, Copycats+,
Sable, Create: Aeronautics).

Tested live: server boots, port 25565 binds, KubeJS loads 0/0 errors,
aerocopycats logs HELLO FROM COMMON SETUP, Railways registers
55+53+238 entries across its three creative tabs. No new crashes.

Known noise: Steam 'n' Rails ships optional loot tables for tracks
of wood types from many other mods (TwilightForest, BYG, TFC, Blue
Skies, Hex Casting, BoP, etc.). Mods absent from this pack produce
~276 'Unknown registry key' ERROR lines once at boot. Harmless —
loot tables for items that don't exist just fail to parse and get
skipped. Standard behavior for Rails on lean packs.

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": "0.27.0",
+  "version": "0.28.0",
   "minecraft": "1.21.1",
   "loader": {
     "type": "neoforge",
     "version": "21.1.228"
   },
-  "lockedAt": "2026-05-04T13:22:58.7131203+00:00",
+  "lockedAt": "2026-05-28T19:27:42Z",
   "mods": [
     {
       "source": "modrinth",
@@ -976,6 +976,28 @@
       "sha1": "a865d9a00a595038d35b908c42565930189be68a",
       "size": 1578765,
       "side": "both"
+    },
+    {
+      "source": "modrinth",
+      "slug": "create-steam-n-rails-1.21.1",
+      "versionId": "oQKsMKfj",
+      "version": "0.2.0+neoforge-mc1.21.1",
+      "path": "mods/railways-0.2.0+neoforge-mc1.21.1.jar",
+      "url": "https://cdn.modrinth.com/data/L3Jv0QZI/versions/oQKsMKfj/railways-0.2.0%2Bneoforge-mc1.21.1.jar",
+      "sha1": "9d52eef0772b81de397271b98c0201a59733f9c6",
+      "size": 12106875,
+      "side": "both"
+    },
+    {
+      "source": "modrinth",
+      "slug": "copycats+-aeronautics-weight",
+      "versionId": "wsXjRa7l",
+      "version": "1.1.1",
+      "path": "mods/aerocopycats-1.1.1.jar",
+      "url": "https://cdn.modrinth.com/data/wjpmYU1u/versions/wsXjRa7l/aerocopycats-1.1.1.jar",
+      "sha1": "3a93862421d0a8cdae1e3a3d7f0d4bd01e049007",
+      "size": 14702,
+      "side": "both"
     }
   ],
   "defaultServer": {
@@ -984,4 +1006,4 @@
   },
   "defaultShader": "ComplementaryReimagined_r5.7.1.zip",
   "panelUrl": "https://bns-admin.sijbers.uk"
-}
+}