🚧 Add an interface to the ChatsWindows to drive its behavior

For now, only the ChatsWindow tabs are toggled on clicks on room names (from ContactsSection).

src/utils.rs

@@ -0,0 +1,28 @@
+use tokio::sync::mpsc::{channel, Receiver as _Receiver, Sender as _Sender};
+
+pub struct Receiver<T>(_Receiver<T>);
+
+impl<T> Receiver<T> {
+    pub(super) async fn recv(&mut self) -> Option<T> {
+        self.0.recv().await
+    }
+}
+
+pub struct Sender<T>(_Sender<T>);
+
+// TODO: Handle error
+impl<T> Sender<T> {
+    pub(super) async fn send(self, t: T) {
+        // self.0.send(t).unwrap();
+        let _ = self.0.send(t).await;
+    }
+}
+
+// TODO: Rename the name of the following fn
+pub fn oneshot<T>() -> (Sender<T>, Receiver<T>) {
+    let (tx, rx) = channel(32);
+    let sender = Sender(tx);
+    let receiver = Receiver(rx);
+
+    (sender, receiver)
+}