This PR adds support for HTML block quotes, that also allows you to have
nested variant of it.
<img width="1441" height="804" alt="Screenshot 2025-10-08 at 10 25 57"
src="https://github.com/user-attachments/assets/4e1da766-fb54-4e87-8654-1ea14330bc97"
/>
Code example used in screenshot:
```html
<blockquote>
<p>
Words can be like X-rays, if you use them properly—they’ll go through
anything. You read and you’re pierced.
</p>
<blockquote>
<p>
lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed non risus. Suspendisse lectus tortor, dignissim sit amet, adipiscing nec, ultricies sed, dolor.
</p>
</blockquote>
</blockquote>
```
Release Notes:
- Markdown: Added support for `HTML` block quotes
4152942a8e