fix: add publishConfig for OIDC trusted publisher with scoped package

Scoped packages need publishConfig.registry in package.json for npm
to correctly exchange the OIDC token with the registry during publish.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: amittell

package.json

@@ -70,6 +70,10 @@
     "url": "https://github.com/amittell/agentcli/issues"
   },
   "homepage": "https://github.com/amittell/agentcli#readme",
+  "publishConfig": {
+    "registry": "https://registry.npmjs.org",
+    "access": "public"
+  },
   "devDependencies": {
     "@eslint/js": "^10.0.1",
     "eslint": "^10.0.2",