feat: Support openrouter.ai

[a-b]

Thansk for amazing plugin. It would be great if you can support https://openrouter.ai

[briansunter]

This looks interesting. I'll look into this. I've been wanting to add better support for local / other models but haven't looked into all the options for doing that.

I've seen some other models be compatible with the openai request format and those should work out of the box, but it looks like this one has it's own request format. https://openrouter.ai/docs/requests

Is there a particular model or feature from openrouter you were interested in using?

[SteamNimmersatt]

@briansunter The good thing about openrouter is that it would allow us a variety of different models, depending on the user needs. There are many free and paid models. Everyone can pick a model that fits his/her needs.

[TomLucidor]

We need standard API tooling like LiteLLM for all the services out there, OpenRouter + top FOSS models like Qwen3 or K2 or DeepSeek or GLM 4.5, any of those will suffice.