[Feature] Update challenger on new challenger link

[Devanshusp]

Problem

When a player clicks on a challenger's link, we want to update their challenger to the most recent share link.

Goal

When a player clicks on a challenger link, update their challenger by updating the invitedBy data.

Additional context

Show a pop up that allows them to accept or reject this new challenger.

• Something like "Click continue to replace your previous challenger [name] with [new name]."