[feat] add automatic version check

src/version_checker/version_checker.h

@@ -0,0 +1,20 @@
+/*
+ * @Author: DI JUNKUN
+ * @Date: 2025-11-11
+ * Copyright (c) 2025 by DI JUNKUN, All Rights Reserved.
+ */
+
+#ifndef _VERSION_CHECKER_H_
+#define _VERSION_CHECKER_H_
+
+#include <string>
+
+namespace crossdesk {
+
+std::string CheckUpdate();
+
+bool IsNewerVersion(const std::string& current, const std::string& latest);
+
+}  // namespace crossdesk
+
+#endif