Add support for temperature sensor peripheral

* Add TEMP peripheral to all nRF52 chips
* Add async HAL for reading temperature values
* Add example application reading temperature values

examples/nrf/src/bin/temp.rs

@@ -0,0 +1,26 @@
+#![no_std]
+#![no_main]
+#![feature(type_alias_impl_trait)]
+
+#[path = "../example_common.rs"]
+mod example_common;
+use example_common::*;
+
+use defmt::panic;
+use embassy::{
+    executor::Spawner,
+    time::{Duration, Timer},
+};
+use embassy_nrf::{interrupt, temp::Temp, Peripherals};
+
+#[embassy::main]
+async fn main(_spawner: Spawner, p: Peripherals) {
+    let irq = interrupt::take!(TEMP);
+    let mut temp = Temp::new(p.TEMP, irq);
+
+    loop {
+        let value = temp.read().await;
+        info!("temperature: {}", value.to_num::<u16>());
+        Timer::after(Duration::from_secs(1)).await;
+    }
+}