chore: rename to @soulcraftlabs/brainy for Open Brainy on The Source

Prepares the repo for its new home at soulcraftlabs/open-brainy ahead
of the Forgejo transfer: package name, publish registry, release
script, and every install/import reference across docs, src, tests,
examples, and integrations now point at @soulcraftlabs/brainy on
The Source. The npmjs storefront leg and byte-identity pair
verification are stripped from the release script — The Source is
now the only publish target. README gains an Open Brainy explainer
and a registry note for consumers.

@soulcraft/brainy 10.4.2 was the last release under the old name.

package.json

@@ -1,5 +1,5 @@
 {
-  "name": "@soulcraft/brainy",
+  "name": "@soulcraftlabs/brainy",
   "version": "10.4.2",
   "description": "Universal Knowledge Protocol™ - World's first Triple Intelligence database unifying vector, graph, and document search in one API. Stage 3 CANONICAL: 42 nouns × 127 verbs covering 96-97% of all human knowledge.",
   "main": "dist/index.js",
@@ -126,15 +126,16 @@
   "license": "MIT",
   "private": false,
   "publishConfig": {
-    "access": "public"
+    "access": "public",
+    "registry": "https://source.soulcraft.com/api/packages/soulcraftlabs/npm/"
   },
-  "homepage": "https://source.soulcraft.com/soulcraft/brainy",
+  "homepage": "https://source.soulcraft.com/soulcraftlabs/open-brainy",
   "bugs": {
-    "url": "https://source.soulcraft.com/soulcraft/brainy/issues"
+    "url": "https://source.soulcraft.com/soulcraftlabs/open-brainy/issues"
   },
   "repository": {
     "type": "git",
-    "url": "git+https://source.soulcraft.com/soulcraft/brainy.git"
+    "url": "git+https://source.soulcraft.com/soulcraftlabs/open-brainy.git"
   },
   "files": [
     "dist/**/*.js",