Add template and utils library.

2022/src/template.rs

@@ -0,0 +1,6 @@
+mod utils;
+
+pub fn execute() -> Result<(), io::Error> {
+
+    Ok(())
+}

2022/src/utils.rs

@@ -0,0 +1,12 @@
+use std::io;
+use std::io::prelude::*;
+use std::fs::File;
+
+fn read_lines(filename: &str) -> io::Result<impl Iterator<Item = io::Result<String>>> {
+    let file = File::open(filename)?;
+    Ok(io::BufReader::new(file).lines())
+}
+
+fn print_step(step: i8, value: u64) {
+    println!("Step {step} solution: {solution}");
+}