Add stubs for days 2 to 25

lib/aoc2024/day_25.ex

@@ -0,0 +1,13 @@
+defmodule Aoc2024.Day25 do
+  def parse(input) do
+    input |> String.split("\n", trim: true)
+  end
+
+  def part1(lines) do
+    length(lines)
+  end
+
+  def part2(lines) do
+    length(lines)
+  end
+end