Add search/filtering to the Response → Body Attribute request picker

Problem The request picker in the Response → Body Attribute tag editor can become difficult to navigate when a workspace contains a large number of requests. Issue #2745 and PR #2777 improved this experience by sorting the requests consistently with the sidebar. However, when there are many requests, users still need to scroll through a long list to locate a specific request. Proposed solution Add search/filtering to the request picker so users can quickly find a request by its name and/or HTTP method. Insomnia already has searchable selection patterns elsewhere in the UI, so this could potentially follow an existing UI pattern rather than introducing a new search implementation. Example The screenshot below shows the current request picker where search/filtering could be added. <img width="972" height="521" alt="Screenshot 2026-09-20 093046" src=" /> Expected behavior • Users can type to filter the available…