Adds pull method and example

examples/pull.rs

@@ -0,0 +1,22 @@
+use std::{env, error::Error, io::Write};
+
+use futures_util::StreamExt;
+use ollama_rs::{OllamaClient, types::pull::PullRequest};
+
+const MODEL: &str = "HammerAI/mythomax-l2";
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn Error>> {
+    let _ = dotenvy::dotenv();
+    let server_address = env::var("OLLAMA_SERVER")?;
+    let ollama_client = OllamaClient::new(server_address);
+
+    let request = PullRequest::builder(MODEL).stream(true).build();
+    let mut stream = ollama_client.pull(request).await;
+    while let Some(response) = stream.next().await {
+        let response = response?;
+        println!("{:?}", response);
+        std::io::stdout().flush()?;
+    }
+    Ok(())
+}