AOC2023: Add script to create day template and download input

userspace/aoc2023/init-day.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+if [[ -z $1 ]]; then
+	echo Please specify day number >& 2
+	exit 1
+fi
+
+if [[ ! -d day$1 ]]; then
+	cp -r day-template day$1
+	sed -i "s/day-template/day$1/g" day$1/*
+fi
+
+if [[ ! -f input/day$1_input.txt ]]; then
+	wget --no-cookies --header "Cookie: session=$AOC_SESSION" https://adventofcode.com/2023/day/$1/input -O input/day$1_input.txt
+fi