This reverts commit 11e56654f8.
#10786 ported the onboarding flow from a standalone prototype and
repointed `/onboarding` at the new `CloudOnboardingFlow`, deleting the
existing `OnboardingWizard.tsx` in the process. The ported flow is not
ready to be the shipping onboarding experience: it landed as a single
large port rather than an incremental migration, it pulled `motion`,
`three` and `@types/three` onto the UI dependency list for prototype
visuals, and it deleted the wizard that four in-flight pull requests
(#9900, #9501, #8982 and one more) were building on — those went
CONFLICTING the moment the file disappeared.
Rather than keep the half-migrated state on master while that is sorted
out, back the port out whole and re-land it incrementally. This restores
`OnboardingWizard.tsx` and the previous versions of the four e2e specs,
drops the `onboarding-preview.html` Vite entry, the DesignGuide
onboarding section and the `data-viz-misc` storybook story, and removes
the three prototype dependencies from `ui/package.json`.
This is an exact mechanical inverse of the squash commit — 41 files,
+2089/-3647, no hand edits. Reverting this commit restores all 41 files
byte for byte, so the port is recoverable in full when it is ready.
`pnpm-lock.yaml` is deliberately not touched. #10786 never updated it;
bot commit 4683f26c9 (#11036) added the `motion`/`three` entries
afterwards, so the lockfile is now ahead of the manifest. CI owns
lockfile updates (`.github/workflows/pr.yml`) and the policy job
regenerates it from the changed manifest.
Co-authored-by: Paperclip <noreply@paperclip.ing>
384e5f6178