Allow the overriding of active/inactive classes for indicators in carousels

[elfaralfreds]

Allow the overriding of active/inactive classes for indicators in carousels

<div 
    id="default-carousel" 
    class="relative w-full" 
    data-carousel="slide" 
    data-carousel-indicator-active-classes="bg-white" 
    data-carousel-indicator-inactive-classes="bg-black"
    >
... other carousel code ...
</div>

Relates to #810