docs: Customize view transition and other layout shift improvements (#43763)

Follow up to https://github.com/zed-industries/zed/pull/43762.

Yet another shot at making the navigation between pages flicker less.

Release Notes:

- N/A
63eb3ea7e0Danilo Leal committed on 11/28/2025, 11:05:58 PM· committed by GitHubparent34b453c
3 files changedLine totals unavailable