This diff introduces the KeyserverSelectionListAddButton and all the necessary navigation logic to navigate to the add keyserver input screen from the keyserver selection list screen
Linear task: https://linear.app/comm/issue/ENG-5408/introduce-keyserver-selection-list-header-right-button
Depends on D9586
I remember asking about it somewhere and you've probably answered, but what is the plan for a scenario where someone appends a log after we started reading but before we finish?