This PR removes the retained `MarkdownStyle` on the `Markdown` entity in favor of using the `MarkdownElement` directly and passing the `MarkdownStyle` to it. This makes it so switching themes will be reflected live in the code block styles. Release Notes: - N/A --------- Co-authored-by: Antonio Scandurra <me@as-cii.com> Co-authored-by: Agus Zubiaga <hi@aguz.me>