[router] Impl radix tree and set up CI (#1893)

Co-authored-by: Lianmin Zheng <lianminzheng@gmail.com>

rust/src/lib.rs

@@ -1,6 +1,7 @@
 use pyo3::prelude::*;
-mod server;
 pub mod router;
+mod server;
+pub mod tree;
 
 // Python binding
 #[pyclass]
@@ -8,7 +9,7 @@ struct Router {
     host: String,
     port: u16,
     worker_urls: Vec<String>,
-    policy: String
+    policy: String,
 }
 
 #[pymethods]
@@ -19,7 +20,7 @@ impl Router {
             host,
             port,
             worker_urls,
-            policy
+            policy,
         }
     }
 
@@ -30,7 +31,9 @@ impl Router {
         let policy = self.policy.clone();
 
         actix_web::rt::System::new().block_on(async move {
-            server::startup(host, port, worker_urls, policy).await.unwrap();
+            server::startup(host, port, worker_urls, policy)
+                .await
+                .unwrap();
         });
 
         Ok(())
@@ -42,4 +45,4 @@ impl Router {
 fn sglang_router(m: &Bound<'_, PyModule>) -> PyResult<()> {
     m.add_class::<Router>()?;
     Ok(())
-}
+}