[router] Implement gRPC SGLangSchedulerClient (#9364)

sgl-router/src/grpc/mod.rs

@@ -0,0 +1,8 @@
+//! gRPC client module for communicating with SGLang scheduler
+//!
+//! This module provides a gRPC client implementation for the SGLang router.
+
+pub mod client;
+
+// Re-export the client
+pub use client::{proto, SglangSchedulerClient};