[Feature]: Getting model list automatically per provider

[arty-hlr]

Feature Description

Instead of having to add each model independently, could it maybe be possible to have a drop down list with available models per provider?

A search on the available models would also be a good idea.

Why would this be helpful?

• verify that a provider is reachable
• prevent manually typing or copy pasting model names
• only choose from actually available models

Proposed Solution (Optional)

• get the list of available models from /v1/models (not sure how Anthropic does it though, this is for openai compatible endpoints)
• add a search on the returned list of models and alternatively allow choosing from a drop down menu (I could imagine that openrouter for example would return a lot of models, so search would be better, but for a provider that only returns a few models, a drop down might be better)

Additional Context

No response

Contribution

• [ ] I am a developer and would like to work on implementing this feature (pending maintainer approval)