[model-gateway] include smg version command in py binding (#14274)

sgl-router/bindings/python/sglang_router/cli.py

@@ -15,6 +15,8 @@ import os
 import sys
 from typing import List, Optional
 
+from sglang_router.sglang_router_rs import get_short_version_string, get_version_string
+
 
 def create_parser() -> argparse.ArgumentParser:
     """Create the main CLI parser with subcommands."""
@@ -51,6 +53,14 @@ def main(argv: Optional[List[str]] = None) -> None:
     if argv is None:
         argv = sys.argv[1:]
 
+    # Handle version flags before parsing
+    if argv and argv[0] in ["--version", "-V"]:
+        if argv[0] == "--version":
+            print(get_version_string())
+        else:
+            print(get_short_version_string())
+        sys.exit(0)
+
     # Handle empty command - show help
     if not argv or argv[0] not in ["launch", "server", "-h", "--help"]:
         parser = create_parser()