Consume ai-delegate v0.3.3

Lembotrequested to merge
ai-delegate-v0.3.3 into main

Update to ai-delegate v0.3.3 which adds fetchModels API and fixes proxy for GET requests.

(supplemental edit: ...And the new auth system, and the improved local mode, and the prompt editor, pretty much everything new for quite a while now.)

Edited by Lem

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