dave: give dave a new home in the sidebar

Signed-off-by: William Casarin <jb55@jb55.com>

crates/notedeck_chrome/src/lib.rs

@@ -5,6 +5,8 @@ pub mod theme;
 #[cfg(target_os = "android")]
 mod android;
 
+mod app;
 mod chrome;
 
+pub use app::NotedeckApp;
 pub use chrome::Chrome;