Openrouter provider

[klimentij]

[Fosowl]

Hi thanks for submitting the draft, I would approve it if you make a pull request. Not sure how well open router would work with agenticSeek tho, some model (like gemma) can ignore or misunderstand the prompt leading to failure with a task, so this would add more indeterminism despite the consideration it's worth providing users with the option. Feel free to switch from draft to pull request. Also please don't push the [config.ini]

[klimentij]

Fixed @Fosowl