Added Shortcode to write sass inside components

[deepakg202]

Similar to https://github.com/gregives/Twelvety, I have added a shortcode to write sass directly inside a component.

Usage:

{% styles %}
// SASS Code Here
{% endstyles %}

And another shortcode to append to any html element

{% append "#sample" %}
World
{% endappend %}

<div id="sample">Hello </div>