chore: remove self-referential agentsys npm dep

package.json declared 'agentsys: ^5.0.0' as a dependency of the
agentsys package itself. npm would resolve this from the registry on
install, pulling a *different* copy of the package as a nested
dependency. Besides being wrong, it means users installing the
published package transitively pull an older v5.x of itself.

Remove the entry and regenerate package-lock.json.

Author: avifenesh

package-lock.json

@@ -81,7 +81,6 @@
     "node": ">=18.0.0"
   },
   "dependencies": {
-    "agentsys": "^5.0.0",
     "js-yaml": "~4.1.1"
   },
   "devDependencies": {