add react demo for images

docs/src/demos/Examples/Images/React/index.jsx

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+import React from 'react'
+import { useEditor, EditorContent } from '@tiptap/react'
+import Document from '@tiptap/extension-document'
+import Paragraph from '@tiptap/extension-paragraph'
+import Text from '@tiptap/extension-text'
+import Image from '@tiptap/extension-image'
+import Dropcursor from '@tiptap/extension-dropcursor'
+import './styles.scss'
+
+export default () => {
+  const editor = useEditor({
+    extensions: [
+      Document,
+      Paragraph,
+      Text,
+      Image,
+      Dropcursor,
+    ],
+    content: `
+      <p>This is a basic example of implementing images. Drag to re-order.</p>
+      <img src="https://source.unsplash.com/8xznAGy4HcY/800x400" />
+      <img src="https://source.unsplash.com/K9QHL52rE2k/800x400" />
+    `,
+  })
+
+  const addImage = () => {
+    const url = window.prompt('URL')
+
+    if (url) {
+      editor.chain().focus().setImage({ src: url }).run()
+    }
+  }
+
+  return (
+    <div>
+      <button onClick={addImage}>
+        add image from URL
+      </button>
+      <EditorContent editor={editor} />
+    </div>
+  )
+}

docs/src/demos/Examples/Images/React/styles.scss

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+/* Basic editor styles */
+.ProseMirror {
+  > * + * {
+    margin-top: 0.75em;
+  }
+
+  img {
+    max-width: 100%;
+    height: auto;
+
+    &.ProseMirror-selectednode {
+      outline: 3px solid #68CEF8;
+    }
+  }
+}

docs/src/demos/Examples/Images/Vue/index.spec.js

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+context('/demos/Examples/Vue', () => {
+  before(() => {
+    cy.visit('/demos/Examples/Vue')
+  })
+
+  // TODO: Write tests
+})

docs/src/demos/Examples/Images/index.spec.js

@@ -1,7 +0,0 @@
-context('/demos/Examples/Images', () => {
-  before(() => {
-    cy.visit('/demos/Examples/Images')
-  })
-
-  // TODO: Write tests
-})