Add websocket handler on server, connect from client

Additionally add /test handler that triggers server->client WS message

web/src/state.rs

@@ -43,7 +43,7 @@ pub fn init(url: Url, orders: &mut impl Orders<Msg>) -> Model {
     };
     // TODO(wathiede): only do this while viewing the index? Or maybe add a new message that force
     // 'notmuch new' on the server periodically?
-    orders.stream(streams::interval(30_000, || Msg::RefreshStart));
+    //orders.stream(streams::interval(30_000, || Msg::RefreshStart));
     orders.subscribe(Msg::OnUrlChanged);
     orders.stream(streams::window_event(Ev::Scroll, |_| Msg::WindowScrolled));