Function init

crates/flowtrace-cli/src/git.rs:104–107

`git init` in `root`. Idempotent — re-init on an existing repo is a no-op.

(root: &Path)

/// `git init` in `root`. Idempotent — re-init on an existing repo is a no-op.
pub fn init(root: &Path) -> Result<()> {
    let _ = open_or_init(root)?;
    Ok(())
}

/// Stage exactly the listed trace-relative paths and commit. Replaces the
/// `add -A` sweep with an explicit declaration of what this commit contains.