Refactor interactivity demos

demos/src/Examples/InteractivityComponent/React/Component.jsx

@@ -0,0 +1,22 @@
+import React from 'react'
+import { NodeViewWrapper } from '@tiptap/react'
+
+export default props => {
+  const increase = () => {
+    props.updateAttributes({
+      count: props.node.attrs.count + 1,
+    })
+  }
+
+  return (
+    <NodeViewWrapper className="react-component">
+      <span className="label">React Component</span>
+
+      <div className="content">
+        <button onClick={increase}>
+          This button has been clicked {props.node.attrs.count} times.
+        </button>
+      </div>
+    </NodeViewWrapper>
+  )
+}