support fmt/std::format

[qicosmos]

Why

support fmt and std::format.

What is changing

Example

#if defined(HAS_FMT_LIB) || defined(HAS_STD_FORMAT)
  ELOGFMT(INFO, "{} {}", 20, 42);
  ELOGFMT(INFO, "it is a long string test {} {}", 42, "fmt");
#endif