helix: Fix replace in helix mode (#34789)

Closes https://github.com/zed-industries/zed/issues/33076

Release Notes:

- Fixed replace command on helix mode: now it actually replaces what was
selected and keeps the replaced text selected to better match helix
7cdd808db2Pablo Ramón Guevara committed on 7/24/2025, 2:29:58 PM· committed by GitHubparent29332c1
2 files changedLine totals unavailable