Include Custom Post Type in Search

How can you include custom post type in search in WordPress? This use case shows how a focused WordPress code snippet can handle the task without installing a heavy plugin. The snippet should include products in WordPress search and produce this result: Search results include WooCommerce products alongside posts. 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.