chore(common): Over-the-air content delivery for crowdin

Crowdin has a beta feature "Over-the-air content delivery"

> Update translated strings of the iOS, Android, or Web applications instantly. No need to submit each new translation as an update to an app and wait for it to be published. The updated translations will become available to users much faster.

It will involve integrating Crowdin SDK and a CDN vault.

### Reference
https://translate.keyman.com/project/keyman/settings#content-delivery