add GuideNodeViews demos

demos/src/GuideNodeViews/DragHandle/Vue/DraggableItem.js

@@ -0,0 +1,29 @@
+import { Node, mergeAttributes } from '@tiptap/core'
+import { VueNodeViewRenderer } from '@tiptap/vue-3'
+import Component from './Component.vue'
+
+export default Node.create({
+  name: 'draggableItem',
+
+  group: 'block',
+
+  content: 'block+',
+
+  draggable: true,
+
+  parseHTML() {
+    return [
+      {
+        tag: 'div[data-type="draggable-item"]',
+      },
+    ]
+  },
+
+  renderHTML({ HTMLAttributes }) {
+    return ['div', mergeAttributes(HTMLAttributes, { 'data-type': 'draggable-item' }), 0]
+  },
+
+  addNodeView() {
+    return VueNodeViewRenderer(Component)
+  },
+})