Add conversion to string.

src/log.rs

@@ -24,6 +24,12 @@ pub struct LogEntry {
     pub message: String,
 }
 
+impl Into<String> for LogEntry {
+    fn into(self) -> String {
+        self.message
+    }
+}
+
 fn setup(mut commands: Commands) {
     commands.spawn().insert(Log::default());
 }