Function main_with 

pub fn main_with(
    args: impl Iterator<Item = String>,
    game: Option<&dyn GameTools>,
) -> u8

Runs the command args on the project of the working folder, with the game’s tools if this is the game’s tool program, and returns the exit code: 0 for success, 1 for a failed check or step, 2 for wrong arguments (SH0nnn), 3 for a setup to fix before running it again (SH1nnn: no project, a project file that lacks what the command needs, no game tool program, cargo that doesn’t start).