Add first-class support for OpenHands as a RepoBench agent.\n\nAcceptance criteria:\n- Document the recommended local OpenHands invocation.\n- Support running it in a RepoBench worktree without special-case patch handling.\n- Capture runtime logs and final diff in the existing report format.\n- Include setup notes for users who already have OpenHands installed.
Add first-class support for OpenHands as a RepoBench agent.\n\nAcceptance criteria:\n- Document the recommended local OpenHands invocation.\n- Support running it in a RepoBench worktree without special-case patch handling.\n- Capture runtime logs and final diff in the existing report format.\n- Include setup notes for users who already have OpenHands installed.