* Add `dsNavStyle` prop, so `sidebar-navigation-ui-update` doesn't change all pages
* Use `useIsDsNav` instead of `useSplitTestContext`
* Create a `useDsNavStyle` hook
* Use `useDsNavStyle`
* Add comment on `useIsDsNav` and `NavStyleContext`
* Revert "Hide nav dropdown chevron icon in welcome page"
This reverts commit 78b5ba85
* Move `DsNavStyleProvider` usage to project-list-ds-nav.tsx
* Fix typo
* Simplify `useDsNavStyle` conditions
GitOrigin-RevId: df3fe66d772919c40df69d357bee6949ab413928