Prepare component example to use embed stackblitz editor.

Author: Hyperkid123

packages/react-renderer-demo/src/app/package.json

@@ -50,6 +50,7 @@
     "@mdx-js/loader": "^1.4.5",
     "@mdx-js/react": "^1.4.5",
     "@next/mdx": "^9.3.3",
+    "@stackblitz/sdk": "^1.3.0",
     "babel-plugin-transform-imports": "^2.0.0",
     "brace": "^0.11.1",
     "clsx": "^1.0.4",

packages/react-renderer-demo/src/app/pages/component-example/checkbox.js

@@ -4,6 +4,7 @@ import useComponentExample from '@docs/hooks/use-component-example';
 import componentTypes from '@data-driven-forms/react-form-renderer/dist/cjs/component-types';
 import MuiCheckbox from '@data-driven-forms/mui-component-mapper/dist/cjs/checkbox';
 import CheckboxText from '@docs/components/mui-definitions/checkbox-text.md';
+import A from '@material-ui/core/Checkbox/Checkbox';
 
 const mappers = {
   mui: {