Factor out parse_rows_of_integers(input) to a new Aoc2024.Utils module

lib/aoc2024/utils.ex

@@ -0,0 +1,16 @@
+defmodule Aoc2024.Utils do
+  def parse_rows_of_integers(input) do
+    input
+    |> String.split("\n", trim: true)
+    |> Enum.map(fn line ->
+      line
+      |> String.split(~r/\s+/)
+      |> Enum.map(fn int_str ->
+        case int_str |> Integer.parse() do
+          {int, ""} -> int
+          _ -> raise "Invalid integer #{int_str}"
+        end
+      end)
+    end)
+  end
+end