New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/coding/base64.hpp

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <string>
+
+namespace base64
+{
+std::string Encode(std::string_view bytesToEncode);
+std::string Decode(std::string const & base64CharsToDecode);
+}  // namespace base64