Remove v1 onboarding and rely only on v2 (#22398)

https://github.com/user-attachments/assets/a6bfaac3-6c79-4fd5-999a-e6a70cff8ac8


Removes the old (v1) signup and onboarding flow now that v2 is the only
path, and drops the `isOnboardingV2` flag entirely. The surviving
(formerly-v2) pages reclaim the canonical `AppPath` members and clean
URLs (`/welcome`, `/verify`, `/workspace-activation`, `/create/profile`,
`/sync/emails`, `/install-apps`, `/invite-team`, `/plan-required`).

- Deletes the v1 pages, the v1 workspace-creation form, the
`isOnboardingV2State` flag + `onboardingV2` URL-param plumbing, and
`InstallAppsAutoSkipEffect`.
- Collapses the router and page-change navigation matrix to a single set
of paths, and renames the v2 components/stories to drop the `V2` suffix.

Follow-up fixes so the single flow behaves correctly on every
deployment:

- Restore the captcha-token, query-param and pageview effects on the
default (root) domain, and serve `/authorize` there so OAuth login keeps
working.
- Gate the invite-team → `/plan-required` interception on billing so
billing-disabled instances aren't trapped on the upgrade page.
- On a cold boot to an auth/onboarding path, show the onboarding loader
instead of the CRM skeleton, and add `/verify-email` and
`/plan-required/payment-success` to that loader path list.
- Add a retry to PaymentSuccess after the confirmation timeout, fix the
InstallApps icon crossfade, restyle the book-call pages for the
full-page layout, and delete code orphaned by the v1 removal.
- Extract the pageview/captcha/query-param logic out of
`PageChangeEffect` into standalone Effect components shared by the root
and workspace app trees.

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---------

Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

packages/twenty-front/src/modules/analytics/components/TrackPageViewEffect.tsx

@@ -0,0 +1,46 @@
+import { useEffect } from 'react';
+import { useLocation } from 'react-router-dom';
+
+import {
+  setSessionId,
+  useEventTracker,
+} from '@/analytics/hooks/useEventTracker';
+import { AnalyticsType } from '~/generated-metadata/graphql';
+import { getPageTitleFromPath } from '~/utils/title-utils';
+
+const PAGEVIEW_TRACKING_DELAY_IN_MS = 500;
+
+const stripQueryAndHash = (url: string): string => {
+  try {
+    const { origin, pathname } = new URL(url);
+    return `${origin}${pathname}`;
+  } catch {
+    return '';
+  }
+};
+
+export const TrackPageViewEffect = () => {
+  const location = useLocation();
+  const eventTracker = useEventTracker();
+
+  useEffect(() => {
+    const timeoutId = setTimeout(() => {
+      setSessionId();
+      eventTracker(AnalyticsType['PAGEVIEW'], {
+        name: getPageTitleFromPath(location.pathname),
+        properties: {
+          pathname: location.pathname,
+          locale: navigator.language,
+          userAgent: window.navigator.userAgent,
+          href: stripQueryAndHash(window.location.href),
+          referrer: stripQueryAndHash(document.referrer),
+          timeZone: Intl.DateTimeFormat().resolvedOptions().timeZone,
+        },
+      });
+    }, PAGEVIEW_TRACKING_DELAY_IN_MS);
+
+    return () => clearTimeout(timeoutId);
+  }, [eventTracker, location.pathname]);
+
+  return null;
+};