feat: update per code review

Author: shenxianpeng

cpp_linter_hooks/util.py

@@ -89,10 +89,19 @@ def _resolve_install(tool: str, version: Optional[str]) -> Optional[Path]:
     return _install_tool(tool, user_version)
 
 
-def main():
-    parser = ArgumentParser("Install specified clang tool wheel")
-    parser.add_argument("--tool", default="clang-format")
-    parser.add_argument("--version", default=None)
+def main() -> int:
+    parser = ArgumentParser(description="Install specified clang tool wheel")
+    parser.add_argument(
+        "--tool",
+        default="clang-format",
+        choices=["clang-format", "clang-tidy"],
+        help="Tool to install (clang-format or clang-tidy)",
+    )
+    parser.add_argument(
+        "--version",
+        default=None,
+        help="Version to install (e.g., 21 or 21.1.2). Defaults to latest compatible version.",
+    )
     args = parser.parse_args()
     path = _resolve_install(args.tool, args.version)
     if path: