implement receiving new header format

include/Helpers.h

@@ -0,0 +1,11 @@
+#include <span>
+#include <string>
+#include <vector>
+
+#pragma once
+
+using ByteSpan = std::span<const char>;
+
+std::string bytespan_to_string(ByteSpan span);
+
+std::vector<char> strtovec(std::string_view str);