Add Option to Exclude Child Category posts from Archive Loop

If an archive loop is in a category page or Category Loop module, there should be an option to only show posts that are directly attached to the category and none from the child categories.

For example, here is a structure:

• Shoes

  • Sneakers

  • Boots

  • …

• Tshirts

Now let’s say there are some shoes that are attached to the subcategory Sneakers but not directly attached to Shoes. Those sneakers should not be shown on the Shoes category page.