pub fn add(
name: Option<&str>,
target: &str,
template: Option<&str>,
) -> Result<()>Expand description
Create an asset from target and apply it to the discovered world.
Tries .concinnity/worlds/ first, then world.jsonl in the working
directory; when neither exists and the target is a 3D scene, the world is
scaffolded at the fallback location.