Better handling of creating EvalValues in UserData templates

src/Utilities/StringUtils.hpp

@@ -15,6 +15,10 @@ namespace Porygon::Utilities{
         static std::u16string IntToString(long const &i) {
             return conv.from_bytes(std::to_string(i));
         }
+        static std::u16string StringToU16String(const std::string& s) {
+            return conv.from_bytes(s);
+        }
+
     };
 }