chore: add format so windows can build

Author: Bilb

include/utilities.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <fmt/format.h>
 #include <napi.h>
 
 #include <optional>
@@ -382,7 +383,7 @@ template <std::size_t N>
 std::array<uint8_t, N> from_hex_to_array(std::string x) {
     std::string as_hex = oxenc::from_hex(x);
     if (as_hex.size() != N) {
-        throw std::invalid_argument(std::format(
+        throw std::invalid_argument(fmt::format(
                 "from_hex_to_array: Decoded hex size mismatch: expected {}, got {}",
                 N,
                 as_hex.size()));
@@ -409,7 +410,7 @@ concept HasSize = requires(T t) {
 template <HasSize T>
 void assert_length(const T& x, size_t n, std::string_view base_identifier) {
     if (x.size() != n) {
-        throw std::invalid_argument(std::format(
+        throw std::invalid_argument(fmt::format(
                 "assert_length: expected {}, got {} for {}", n, x.size(), base_identifier));
     }
 }