Function init_with 

pub fn init_with(
    path: &Path,
    provider: Option<&str>,
    model: Option<&str>,
    force: bool,
    found: Option<Found>,
    env: &dyn Fn(&str) -> bool,
) -> CommandResult

speccoder init [--provider] [--model] [--force] with an explicit view of the environment and of what is installed.