Exclude .repo folders by default (#34431)

Peter Tripp created 

These are used by [Google's `repo`
tool](https://android.googlesource.com/tools/repo) used for Android for
managing hundreds of git subprojects.

Originally reported in:
- https://github.com/zed-industries/zed/issues/34302

Release Notes:

- Add Google Repo `.repo` folders to default `file_scan_exclusions`

Change summary

assets/settings/default.json | 1 +
1 file changed, 1 insertion(+)

Detailed changes