feat: bind r to restart current countdown

src/pomodoro.rs

@@ -52,6 +52,7 @@ impl Pomodoro {
                                 self.paused = Default::default();
                             }
                         }
+                        KeyCode::Char('r') | KeyCode::Char('R') => self.restart(),
                         KeyCode::Char('q') | KeyCode::Char('Q') => break,
                         KeyCode::Char('c') if key_event.modifiers == KeyModifiers::CONTROL => break,
                         _ => {}
@@ -64,6 +65,11 @@ impl Pomodoro {
         Ok(())
     }
 
+    fn restart(&mut self) {
+        self.wait_start = Some(Instant::now());
+        self.paused = Default::default();
+    }
+
     fn notify_complete(&self) -> Result<(), Box<dyn Error>> {
         let mut toast = notify_rust::Notification::new();
         toast.summary("Pomodoro cycle complete!");