Access the Wakfu Lua runtime from command-line
Extract the luafu.zip archive to luafu directory under the main game directory. Make sure you end up with a file at Wakfu\luafu\launch.ps1.
You can right-click launch.ps1 and click Run with PowerShell, it should launch a terminal window and an instance of the game.
After entering a game world, you can try out an example script by typing dofile("example.lua") and hitting enter in the terminal.