first commit for chrg

rt-thread/tools/hello/hello.c

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2025 RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2025-06-21     Bernard      First version
+ */
+
+#include <rtthread.h>
+#include "hello.h"
+
+/**
+ * @brief Hello world function implementation
+ *
+ * This function prints "Hello World!" to the console using rt_kprintf
+ */
+void hello_world(void)
+{
+    rt_kprintf("Hello World!\n");
+}