feat: Update readme with newer UX/DX Rust Leptos app, update slides and misc stuff

examples/try_rust_webapp/src/main.rs

@@ -30,12 +30,10 @@ async fn main() {
             }),
             Box::new(Monitoring {
                 application: application.clone(),
-                alert_receiver: vec![
-                    Box::new(DiscordWebhook {
+                alert_receiver: vec![Box::new(DiscordWebhook {
                     name: "test-discord".to_string(),
                     url: hurl!("https://discord.doesnt.exist.com"),
-                    }),
-                ],
+                })],
             }),
         ],
         application,