The conseil d’État is nothing like a Supreme Court. It is an administrative body, not a court of law. This phrase was used because it was easier than explaining how it actually works to a presumably mostly-American audience. France has a civil law system, there cannot be anything like the American Supreme Court.
> Is there no equivalent to "contempt of court" in french law? Is this typical?
It is not a court, and it does not have the powers American judges have. The role of the Council of State (one of them, anyway, and the relevant one here) is to rule on administrative matters. They cannot decide to fine someone or put someone in jail. They can decide that a government body was wrong on something and make it change, that’s it.