Add OpenRouter API + a question

[maribox]

Hey!
With OpenRouter, you can pay them instead of the actual AI Companies and then (for a 5% fee) use basically every major LLM through them.

I use it instead of OpenAI or Anthropic etc. API's and it would be cool to have this added (if you're interested, I think this would also enable you to have any model you desire outside of OpenAI and Anthropic's ones without much additional configuration)

Also as a side note, a little question:

• The standard TTS models are a little mediocre in my opinion. Have you thought about enabling the use of TTS API's? (Or maybe are there better Engines for TTS on Android than the default?)