Update `zed_llm_client` to v0.8.1 (#30433)

This PR updates the `zed_llm_client` crate to v0.8.1.

The name of `Plan::Free` changed to `Plan::ZedFree` in this version.

Release Notes:

- N/A
f29c6e5661Marshall Bowers committed on 5/9/2025, 9:08:03 PM· committed by GitHubparent000077f
10 files changedLine totals unavailable