Add support for rtl and ltr shortcodes

[mohnoor94]

This is to support rtl and ltr short-codes.

Use Case:

You may need to insert some contents in a different direction compared to your main site direction so that these shortcodes will come in handy.

Important notes:

• These shortcodes will support md by default.
• If you want to include sub-shortcodes, you can set the md parameter to false.

Examples:

{{< rtl >}}

> مرحبا بك

{{< /rtl >}}

This will result in rtl contents rendered using md.

---

{{< rtl md=false >}}
{{< blockquote >}}

مرحبا بك

{{< /blockquote >}}
{{< /rtl >}}

This will result in a blockquote in rtl.

---

{{< rtl false >}}
{{< blockquote >}}

مرحبا بك

{{< /blockquote >}}
{{< /rtl >}}

This will result in a blockquote in rtl (same example above, but with positional argument instead of a named argument in the content file).

---

The ltr shortcode could be used in the same way but in the context of an rtl website.

[adityatelange]

@mohnoor94 This seems good, can we have a slight change here, let the content be markdown enabled by default and pass the md=false param to disable it ?

[sonarcloud]

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[mohnoor94]

@mohnoor94 This seems good, can we have a slight change here, let the content be markdown enabled by default and pass the md=false param to disable it ?

I was thinking about the same tbh. Updated 👍🏼

[adityatelange]

Nice !