Moved the 05-led-roulette light-it-up example to a project example

Author: nikgul

microbit/src/05-led-roulette/examples/light-it-up.rs

@@ -0,0 +1,18 @@
+#![deny(unsafe_code)]
+#![no_main]
+#![no_std]
+
+use cortex_m_rt::entry;
+use embedded_hal::digital::OutputPin;
+use panic_halt as _;
+use microbit::board::Board;
+
+#[entry]
+fn main() -> ! {
+    let mut board = Board::take().unwrap();
+
+    board.display_pins.col1.set_low().unwrap();
+    board.display_pins.row1.set_high().unwrap();
+
+    loop {}
+}

microbit/src/05-led-roulette/light-it-up.md

@@ -32,24 +32,7 @@ The code required to light up an LED in the matrix is actually quite simple but
 a look at it and then we can go through it step by step:
 
 ```rust
-#![deny(unsafe_code)]
-#![no_main]
-#![no_std]
-
-use cortex_m_rt::entry;
-use embedded_hal::digital::OutputPin;
-use panic_halt as _;
-use microbit::board::Board,
-
-#[entry]
-fn main() -> ! {
-    let mut board = Board::take().unwrap();
-
-    board.display_pins.col1.set_low().unwrap();
-    board.display_pins.row1.set_high().unwrap();
-
-    loop {}
-}
+{{#include examples/light-it-up.rs}}
 ```
 
 The first few lines until the main function just do some basic imports and setup we already looked at before.