aoc24: add day10

sol/24/day09.cpp

@@ -0,0 +1,7 @@
+#include "aoc.hpp"
+#include "aoc/utils.hpp"
+#include "fmt/format.h"
+
+auto aoc24::day09([[maybe_unused]]std::span<char const*> const& args) -> std::expected<void, aoc::error> {
+    return aoc::make_error("", std::errc::not_supported);
+}