chore(react-auth): remove use-sync-external-store dependency

Agent-Logs-Url: https://github.com/forwardsoftware/react-auth/sessions/dc5e5d91-0c76-4981-be2d-7a45d09981e6

Co-authored-by: panz3r <1754457+panz3r@users.noreply.github.com>

Author: Copilot

lib/package.json

@@ -40,17 +40,14 @@
     "@types/node": "^25.2.3",
     "@types/react": "catalog:",
     "@types/react-dom": "catalog:",
-    "@types/use-sync-external-store": "^1.5.0",
     "@vitejs/plugin-react": "catalog:",
     "jsdom": "catalog:",
     "react": "catalog:",
     "react-dom": "catalog:",
     "vite": "catalog:",
     "vitest": "catalog:"
   },
-  "dependencies": {
-    "use-sync-external-store": "^1.6.0"
-  },
+  "dependencies": {},
   "peerDependencies": {
     "react": ">=16.8"
   }