Do not panic when looking for prettier (#3182)

Fixes
https://zed-industries.slack.com/archives/C04S6T1T7TQ/p1698655595438009

Instead of checking FS, derive the prettier path needed and let prettier
invocation fail in logs instead.
6aca2289ebKirill Bulatov committed on 10/30/2023, 10:58:47 AM· committed by GitHubparents96bbb5cb46a4b5
1 file changedLine totals unavailable