Derive Default implementations wherever possible

examples/todos/src/main.rs

@@ -285,18 +285,13 @@ struct Task {
     state: TaskState,
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Default)]
 pub enum TaskState {
+    #[default]
     Idle,
     Editing,
 }
 
-impl Default for TaskState {
-    fn default() -> Self {
-        Self::Idle
-    }
-}
-
 #[derive(Debug, Clone)]
 pub enum TaskMessage {
     Completed(bool),