move @blitzkit/closed to optional

packages/scripts/package.json

@@ -10,7 +10,6 @@
     "vfs": "bun src/vfs/index.ts"
   },
   "dependencies": {
-    "@blitzkit/closed": "workspace:*",
     "@blitzkit/core": "workspace:*",
     "@blitzkit/i18n": "workspace:*",
     "@gltf-transform/core": "^4.2.1",
@@ -43,5 +42,8 @@
     "unzipit": "^1.4.3",
     "yaml": "^2.8.1"
   },
+  "optionalDependencies": {
+    "@blitzkit/closed": "workspace:*"
+  },
   "type": "module"
 }