Function spawn 

pub async fn spawn<L>(
    peer: Peer<L>,
    shutdown_rx: Receiver<()>,
) -> Result<(), PeerError>
where
    L: BucketLogProvider + Clone + Send + Sync + Debug + 'static,
    L::Error: Display + Error + Send + Sync + 'static,

Spawn the peer with protocol router

This starts the iroh protocol router for handling incoming connections. The peer’s sync provider is responsible for managing its own background workers.

Arguments

• peer - The peer instance to run
• shutdown_rx - Watch receiver for shutdown signal