app: improve errors a bit more

added a message to the label so the position of the error gets shown
and a note to make clear we don't have enough info for better error
messages thanks to serde

crates/app/src/main.rs

@@ -39,8 +39,13 @@ mod error_reporting {
         let offset = try_reconstruct_loc(src, err.line(), err.column());
 
         Report::build(ariadne::ReportKind::Error, "test", offset)
-            .with_label(Label::new(("test", offset..offset)))
+            .with_label(
+                Label::new(("test", offset..offset)).with_message("Something went wrong here!"),
+            )
             .with_message(err.to_string())
+            .with_note(
+                "We'd like to give better errors, but serde errors are horrible to work with...",
+            )
             .finish()
             .print(("test", Source::from(src)))
             .unwrap();