agent: Refine language model selector (#28597)

Release Notes:

- agent: Show recommended models in the agent model selector and display
the provider in the model selector's trigger.

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Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
Co-authored-by: Danilo Leal <67129314+danilo-leal@users.noreply.github.com>
b22faf96e0Bennet Bo Fenner committed on 4/11/2025, 11:02:50 PM· committed by GitHubparentdafe994
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