Day 5 part1 completed

Also, deleted an example_input.txt, modified .gitignore
added a script to get the current day's input

get_today_puzzle.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+DAY=`date "+%-e"`
+mkdir day${DAY}
+# You have to get your cookie header in text format (Cookie: session=xxxx)
+wget --verbose --header "`cat cookies.txt`" "https://adventofcode.com/2023/day/${DAY}/input" -O day${DAY}/input.txt