Add details to run_in_terminal tool result

[zhichli]

The current tool call log exported from chat debug view only has args and response of LanguageModelToolResult2, but it would be good to have more details like working directory and isError details.

    {
      "id": "toolu_01Mm4K4KcAgkzvn38W3D1BJG__vscode-1757355997273",
      "kind": "toolCall",
      "tool": "run_in_terminal",
      "args": "{\"command\": \"echo $((1+7))\", \"explanation\": \"Calculate 1+7 using bash arithmetic expansion\", \"isBackground\": false}",
      "time": "2025-09-08T18:27:53.409Z",
      "response": [
        "8\n"
      ]
    }