Enable logging in clock example

examples/clock/Cargo.toml

@@ -10,3 +10,4 @@ iced.workspace = true
 iced.features = ["canvas", "tokio", "debug"]
 
 time = { version = "0.3", features = ["local-offset"] }
+tracing-subscriber = "0.3"

examples/clock/src/main.rs

@@ -8,6 +8,8 @@ use iced::{
 };
 
 pub fn main() -> iced::Result {
+    tracing_subscriber::fmt::init();
+
     iced::program("Clock - Iced", Clock::update, Clock::view)
         .subscription(Clock::subscription)
         .theme(Clock::theme)