Use bun

package.json

@@ -22,8 +22,6 @@
     "nuxt": "^4.0.3",
     "nuxt-auth-utils": "0.5.23",
     "openai": "^5.12.2",
-    "posthog-js": "^1.259.0",
-    "posthog-node": "^5.6.0",
     "radash": "^12.1.1",
     "ts-pattern": "^5.8.0",
     "url": "^0.11.4",