Method cleanup

crates/chat-cli/src/cli/chat/checkpoint.rs:334–339

Clean up shadow repository

(&self, os: &Os)

    /// Clean up shadow repository
    pub async fn cleanup(&self, os: &Os) -> Result<()> {
        if self.shadow_repo_path.exists() {
            os.fs.remove_dir_all(&self.shadow_repo_path).await?;
        }
        Ok(())
    }

    fn get_checkpoint(&self, tag: &str) -> Result<&Checkpoint> {
        self.tag_index