Add Shortcode for Current Year

How can you add shortcode for current year in WordPress? This use case shows how a focused WordPress code snippet can handle the task without installing a heavy plugin. The snippet should create a shortcode that prints the current year and produce this result: The shortcode [current_year] outputs the current year dynamically. You can also log in to LeonLab.ai, describe this WordPress use case in plain English, generate the snippet, review the PHP code, and deploy it to the selected WordPress project.