Implement link sharing warning events by reusing the StartFreeTrial paywall button component from the original modal
GitOrigin-RevId: 9c16407ad8a7b5afc9b5b13be1491ef903ae74a3
* Add helpers for checking and removing user readwrite token membership
* Add sharing-updates page and handlers
* Redirect read write token members to sharing-updates on project load
GitOrigin-RevId: d552a2cd74a9843c6103923b03f137131a48877a