add missing fields to WebSearchAction and update app-server types (#10276)

- add `WebSearchAction` to app-server v2 types
- add `queries` to `WebSearchAction::Search` type

Updated tests.

codex-rs/protocol/src/protocol.rs

@@ -2469,6 +2469,7 @@ mod tests {
                 query: "find docs".into(),
                 action: WebSearchAction::Search {
                     query: Some("find docs".into()),
+                    queries: None,
                 },
             }),
         };