Split IP stuff into separate source and WIP implementation of name resolution.

source/mijin/util/string.hpp

@@ -299,7 +299,10 @@ template<typename TChar, typename TTraits, typename TNumber>
 [[nodiscard]]
 constexpr bool toNumber(std::basic_string_view<TChar, TTraits> stringView, TNumber& outNumber, int base = 10) noexcept requires (!std::is_same_v<TChar, char>)
 {
-    std::string asString(stringView.begin(), stringView.end());
+    std::string asString;
+    asString.resize(stringView.size());
+    // should only contain number symbols, so just cast down to char
+    std::transform(stringView.begin(), stringView.end(), asString.begin(), [](TChar chr) { return static_cast<char>(chr); });
     return toNumber(asString, outNumber, base);
 }