Add Featured Image Column

How can you add featured image column in WordPress? This use case shows how a focused WordPress code snippet can handle the task without installing a heavy plugin. The snippet should add a featured image column to the post list and produce this result: The Posts/News table shows a thumbnail column for each item. 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.