Fixes
https://linear.app/zed-industries/issue/Z-1793/file-finder-external-recent-paths-are-not-rendered-properly

Long paths get trimmed, but same do many of our other elements, such as
type definitions, so I think it's ok for now:

![image](https://github.com/zed-industries/zed/assets/2690773/b8b6588d-6d6b-42db-9085-c741a40b7adb)

Also, we seem to do a lot of odd diagnostics handling on every external
stdlib file opened:

![image](https://github.com/zed-industries/zed/assets/2690773/cd82c54e-7849-46fe-a01c-79bfc5402b7b)
Other external files also emit similar messages, but not that much.
@\mikayla-maki mentioned, that this was happening before, so can be
fixed separately.
The PR adds path printing to these logs.

Release Notes:

* Fixed external files not being displayed properly in the recently
opened list in the file finder panel