Add link to README; add print statement to main

src/main.rs

@@ -1,6 +1,7 @@
 #![no_std]
 #![no_main]
 
+use defmt::info;
 use embassy_executor::Spawner;
 use embassy_nrf::gpio::{Level, Output, OutputDrive};
 use embassy_time::Timer;
@@ -11,6 +12,8 @@ async fn main(_spawner: Spawner) {
     let p = embassy_nrf::init(Default::default());
     let mut led = Output::new(p.P0_18, Level::Low, OutputDrive::Standard);
 
+    info!("Starting blinky");
+    
     loop {
         led.set_high();
         Timer::after_millis(300).await;