openrouter web search via api

[yu-chun-kit]

openrouter provided a feature of web search via api, according to their document it just need to add :onlinepostfix behind model, or line "plugins": [{ "id": "web" }] to

{
  "model": "openai/gpt-4o",
  "plugins": [{ "id": "web" }]
}

is it possible to implement this in liberchat just like the new feature of web search toggle button in chatgpt app. it is better to allow to change custom options, according to openrouter's document:

{
  "model": "openai/gpt-4o:online",
  "plugins": [
    {
      "id": "web",
      "max_results": 3,
      "search_prompt": "Consider these web results when forming your response:"
    }
  ]
}

in librechat.yaml too, since it is a bit expensive for $4 per 1,000 web results.

References:
https://openrouter.ai/announcements/introducing-web-search-via-the-api