What is cemu steam deck?

As an AI language model, my training data is limited to mid-2021, and at that time, there was no official announcement or confirmation from Cemu regarding compatibility with the Steam Deck. Cemu is a popular emulator that allows playing Wii U and Nintendo Switch games on PC. The Steam Deck is a portable gaming device by Valve that runs on a modified version of SteamOS. It is designed to play PC games on the go. Since both Cemu and the Steam Deck are relatively new and evolving technologies, it is possible that they may have compatibility in the future, but this is speculative. For the most up-to-date information on any official support for Cemu on the Steam Deck, it would be best to visit the official websites of Cemu and the Steam Deck for updates.