add bubble menu from v1

docs/src/demos/Extensions/BubbleMenu/index.vue

@@ -0,0 +1,85 @@
+<template>
+  <div>
+    <div ref="menu">
+      menu
+    </div>
+    <editor-content :editor="editor" />
+  </div>
+</template>
+
+<script>
+import { Editor, EditorContent } from '@tiptap/vue-2'
+import Document from '@tiptap/extension-document'
+import Paragraph from '@tiptap/extension-paragraph'
+import Text from '@tiptap/extension-text'
+import BubbleMenu from '@tiptap/extension-bubble-menu'
+
+export default {
+  components: {
+    EditorContent,
+  },
+
+  data() {
+    return {
+      editor: null,
+    }
+  },
+
+  mounted() {
+    this.editor = new Editor({
+      extensions: [
+        Document,
+        Paragraph,
+        Text,
+        BubbleMenu.configure({
+          element: this.$refs.menu,
+        }),
+      ],
+      content: `
+        <p>
+          paragraph
+        </p>
+        <p>
+          paragraph
+        </p>
+        <p>
+          paragraph
+        </p>
+      `,
+    })
+  },
+
+  beforeDestroy() {
+    this.editor.destroy()
+  },
+}
+</script>
+
+<style lang="scss">
+.has-focus {
+  border-radius: 3px;
+  box-shadow: 0 0 0 3px #68CEF8;
+}
+
+/* Basic editor styles */
+.ProseMirror {
+  > * + * {
+    margin-top: 0.75em;
+  }
+
+  ul,
+  ol {
+    padding: 0 1rem;
+  }
+
+  blockquote {
+    padding-left: 1rem;
+    border-left: 2px solid rgba(#0D0D0D, 0.1);
+  }
+
+  code {
+    background-color: rgba(#616161, 0.1);
+    color: #616161;
+  }
+}
+</style>