agent: Add websearch tool (#28621)

Staff only for now. We'll work on making this usable for non zed.dev
users later

Release Notes:

- N/A

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Co-authored-by: Antonio Scandurra <me@as-cii.com>
Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
Co-authored-by: Marshall Bowers <git@maxdeviant.com>
456e54b87cBennet Bo Fenner committed on 4/16/2025, 5:25:00 PM· committed by GitHubparent2b27712
22 files changedLine totals unavailable