Update model selector (#15665)

Release Notes:

- N/A

---------

Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

assets/icons/ai_anthropic.svg

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assets/icons/ai_google.svg

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assets/icons/ai_ollama.svg

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assets/icons/ai_open_ai.svg

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assets/icons/ai_zed.svg

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