zed: Reduce number of rayon threads, spawn with bigger stacks (#41812)

We already do this for the cli and remote server but forgot to do so for
the main binary

Release Notes:

- N/A *or* Added/Fixed/Improved ...
f8b414c22cLukas Wirth committed on 11/3/2025, 12:28:32 PM· committed by GitHubparent5050479
3 files changedLine totals unavailable