This PR fixes an issue where the `settings` field for a context server
would not show up in the completions when editing the Zed settings.
It seems that `schemars` doesn't like the `serde_json::Value` as a
setting type when generating the JSON Schema. To address this, we are
using a custom schema of an empty object (as we don't yet have any other
information as to the structure of a given context server's settings).
Release Notes:
- context_servers: Fixed `settings` field not being suggested in
completions when editing `settings.json`.
Marshall Bowers
973498e075