Add back "fs: Replace MacWatcher with notify::FsEventWatcher"" (#47952)

Reverts zed-industries/zed#47799

Now that we have a week to let this be tested in Nightly we can merge it
again

Release Notes:
 
- Fix to many file descriptors error in MacOS
cd8a7b4292Anthony Eid committed on 1/29/2026, 5:27:55 PM· committed by GitHubparent263e000
10 files changedLine totals unavailable