grep tool times out on large repos before returning any results

[mcodilla]

Describe the bug

When using the built in grep tool in a large mono repo, the tool returns "timeout" with no results. I had to instruct copilot to use ripgrep rg, instead.

Affected version

GitHub Copilot CLI 1.0.36

Steps to reproduce the behavior

1. Open Copilot CLI in a large monorepo
2. Ask to search for a pattern across a folder and its subdirectories, dont nudge it to use ripgrep yet
3. It'll start grepping and maybe timeout

Expected behavior

The grep tool should return results (even partial) within a reasonable time

Additional context

No response