Onboarding refactor (#39724)

<img width="1648" height="976" alt="Screenshot 2025-10-07 at 6 57 20 PM"
src="https://github.com/user-attachments/assets/ae7289c0-8820-4fdf-ae28-84fb6bd64942"
/>

Fixes #39347

Release Notes:

- Improved onboarding UI by collapsing it to a single page

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Co-authored-by: dino <dinojoaocosta@gmail.com>
Co-authored-by: Lukas Wirth <me@lukaswirth.dev>
Co-authored-by: Mikayla Maki <mikayla.c.maki@gmail.com>
Co-authored-by: Anthony Eid <hello@anthonyeid.me>
Co-authored-by: Mikayla Maki <mikayla@zed.dev>
ba937d16e7Andrew Farkas committed on 10/8/2025, 10:47:25 PM· committed by GitHubparent4dbd186
15 files changedLine totals unavailable