Add an empty table view controller to represent the Notifications Center.
- Precondition: the user will only be able to view/navigate to the Notifications Center if they are logged in
- Push to this view in a new navigation stack when the Bell icon in Explore feed and Settings (when Explore is disabled) is tapped
- Ensure it is presented with the standard pushing and popping animation transitions and not the custom Explore feed style card transition
- Add Edit button in navigation bar
- Add bottom toolbar for action buttons/message