Some changes in the LanguageModelRegistry caused the web search tool not
to show up, because the `DefaultModelChanged` event is not emitted at
startup anymore.
Release Notes:
- agent: Fixed an issue where the web search tool would not be available
after starting Zed (only when using zed.dev as a provider).
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>