* feat(markup): add toggle code block functionality with multiple format support
* fix(assets): improve filename generation for code downloads
* feat(code): add `before_tabs` attribute support for tabbed code blocks
* feat(code): implement visibility control for first tab content in code blocks
> The `Param` method on a `Page` object looks for the given `KEY` in page parameters, and returns the corresponding value. If it cannot find the `KEY `in page parameters, it looks for the `KEY` in site parameters. If it cannot find the `KEY` in either location, the Param method returns `nil`.
>
> See: https://gohugo.io/methods/page/param/
So `.Page.Param` is only suitable for simple types.
Cell