pas de commande shell dans le code vs

If you are on Windows and facing the same problem, have a look at Inazense's answer, 
Visual Studio Code - "Shell Command: Install 'code' command in PATH command.".

In Visual Studio Code I was not able to find “Shell Command: Install 'code' command in PATH command.” so I had to do this manually.

Open Environment Variables (System → Advanced system settings → Advanced tab → Environment variables). In system variables, click on Path and click Edit and add a new path named:
"C:\Users\Your_Username\AppData\Local\Programs\Microsoft VS Code\bin"
CHIN YEE WAN