add GuideNodeViews demos

demos/src/GuideNodeViews/VueComponentContent/Vue/index.vue

@@ -0,0 +1,54 @@
+<template>
+  <editor-content :editor="editor" />
+</template>
+
+<script>
+import { Editor, EditorContent } from '@tiptap/vue-3'
+import StarterKit from '@tiptap/starter-kit'
+import VueComponent from './Extension.js'
+
+export default {
+  components: {
+    EditorContent,
+  },
+
+  data() {
+    return {
+      editor: null,
+    }
+  },
+
+  mounted() {
+    this.editor = new Editor({
+      extensions: [
+        StarterKit,
+        VueComponent,
+      ],
+      content: `
+        <p>
+          This is still the text editor you’re used to, but enriched with node views.
+        </p>
+        <vue-component>
+          <p>This is editable.</p>
+        </vue-component>
+        <p>
+          Did you see that? That’s a Vue component. We are really living in the future.
+        </p>
+      `,
+    })
+  },
+
+  beforeDestroy() {
+    this.editor.destroy()
+  },
+}
+</script>
+
+<style lang="scss">
+/* Basic editor styles */
+.ProseMirror {
+  > * + * {
+    margin-top: 0.75em;
+  }
+}
+</style>