Brief feature description

Iceoryx uses a variety of strings (std::string, cxx::string<>, cxx::CString100, etc).
Once #253 is merged this mishmash should be cleaned-up.

Detailed information

Only use cxx:string<> or types created from it.

• No std::string in public API

• No more std::strings in code base

  • iceoryx_utils
  • iceoryx_posh
  • ic

Empty slices and strs will still align writers, which can potentially waste space. Instead, they should point to the start of the archive (pos 0).