Add examples

crates/dht/Cargo.toml

@@ -35,3 +35,4 @@ clone_to_owned = {path="../clone_to_owned", package="librqbit-clone-to-owned", v
 librqbit-core = {path="../librqbit_core", version = "2.2.1"}
 
 [dev-dependencies]
+tracing-subscriber = "0.3"

crates/dht/examples/dht.rs

@@ -8,6 +8,8 @@ use tracing::info;
 #[tokio::main]
 async fn main() -> anyhow::Result<()> {
     let info_hash = Id20::from_str("64a980abe6e448226bb930ba061592e44c3781a1").unwrap();
+    tracing_subscriber::fmt::init();
+
     let dht = Dht::new().await.context("error initializing DHT")?;
     let mut stream = dht.get_peers(info_hash).await?;