add basic drawing example

docs/src/demos/Examples/Drawing/index.vue

@@ -0,0 +1,57 @@
+<template>
+  <div v-if="editor">
+    <editor-content :editor="editor" />
+  </div>
+</template>
+
+<script>
+import Collaboration from '@tiptap/extension-collaboration'
+import { Editor, EditorContent } from '@tiptap/vue-starter-kit'
+import Document from '@tiptap/extension-document'
+import Paragraph from '@tiptap/extension-paragraph'
+import Text from '@tiptap/extension-text'
+import * as Y from 'yjs'
+import { WebsocketProvider } from 'y-websocket'
+import Paper from './Paper.js'
+
+export default {
+  components: {
+    EditorContent,
+  },
+
+  data() {
+    return {
+      editor: null,
+    }
+  },
+
+  mounted() {
+    const ydoc = new Y.Doc()
+    const provider = new WebsocketProvider('wss://websocket.tiptap.dev', 'tiptap-draw-example', ydoc)
+
+    this.editor = new Editor({
+      extensions: [
+        Document.extend({
+          content: 'paper paragraph',
+        }),
+        Paragraph,
+        Text,
+        Collaboration.configure({
+          provider,
+        }),
+        Paper,
+      ],
+      content: `
+        <div data-type="paper"></div>
+      `,
+      onUpdate: () => {
+        // console.log(this.editor.getJSON())
+      },
+    })
+  },
+
+  beforeDestroy() {
+    this.editor.destroy()
+  },
+}
+</script>