Add Example 10 to docs

docs/.vuepress/config.js

@@ -16,6 +16,7 @@ module.exports = {
           "/examples/DisabledItems.md",
           "/examples/Responsive.md",
           "/examples/MultipleItemsY.md",
+          "/examples/Animals.md",
         ],
       },
     ],

docs/examples/Animals.md

+# Example 10: Animals
+
+This example shows, how one can find out, if the user is dragging an item,
+which item is being dragged and which grid is being dragged over. This is
+an example for the proper `isDraggedOver` and the
+`containerDragStart` and `containerDragEnd` events.
+
+<ClientOnly>
+<script setup>
+import ExampleAOverlay from "../../example/src/ExampleAOverlay.vue";
+</script>
+
+<ExampleAOverlay />
+</ClientOnly>