implement error view which displays all error on the display

src/views/journal_view.rs

@@ -1,3 +1,5 @@
+use alloc::boxed::Box;
+use core::error;
 use crate::peripherals::Peripherals;
 use core::future;
 
@@ -27,9 +29,10 @@ impl Navigable for JournalView {
         &self,
         outputs: &mut Outputs,
         _: &Peripherals,
-    ) -> impl core::future::Future<Output = ()> + Send {
+    ) -> impl core::future::Future<Output = Result<(), Box<dyn error::Error>>> + Send {
         async move {
             outputs.primary_display.clear(Rgb565::BLACK).unwrap();
+            Ok(())
         }
     }