* Implement onboarding video tour split test:
- Add split test infrastructure
- Create new `OnboardingVideoTourModal` component
- Place the component inside the editor pug template with a split test
* add event segmentation for `onboarding-video-tour-close-button-click` event:
1. video: `first` | `second`
2. firstVideoWatchingTimeInSecond: total time watching first video
2. secondVideoWatchingTimeInSecond: total time watching second video (0 if skipped)
* add event segmentation for:
1. `onboarding-video-tour-dismiss-button-click`
2. `onboarding-video-tour-next-button-click`
3. `onboarding-video-tour-done-button-click`
with these key/value:
1. firstVideoWatchingTimeInSecond: total time watching first video
2. secondVideoWatchingTimeInSecond: total time watching second video (0 if skipped/not watched yet)
* Use contentful to host video assets
GitOrigin-RevId: 27a6f38d15d7a03b07455e216dda63d99983ca80
