SDK Prompting for permissions to read an output file created by CLI for large outputs

```
{"type":"tool.execution_complete","data":{"toolCallId":"call_Gy2uDhKI9qIX2yMRS5USIm3C","....,"result":{"content":"Output too large to read at once (74.5 KB). Saved to: /var/folders/tk/xz6l8fxs0cxgphyh0xy2n4hh0000gn/T/copilot-tool-output-1776206629188-gotvti.txt\nConsider using tools like grep (for [\"ts\",\"js\",\"json\"]","matches_found":"true","large_output":"true","large_output_file":"/var/folders/tk/xz6l8fxs0cxgphyh0xy2n4hh0000gn/T/copilot-tool-output-1776206629188-gotvti.txt"},"
```

& then SDK passes permission request onto client to read this file.
CLI should auto approve such reads.

首先，从输出被保存到临时文件且 SDK 将读取权限请求转发给客户端的地方开始，跟踪 CLI 大型输出的处理流程。完成的标准是：读取这些由 CLI 创建的输出文件时会自动获批，无需额外向客户端请求权限。

由索引模型根据 Issue 内容生成。