[🚀esl-drag-to-scroll]: implement component to make user able to scroll trough drag events

[ala-n]

• Custom attribute (mixin) esl-drag-to-scroll

• API :

  • axis (MVP) - axises to handle manipulation (default: 'both')
  • cls - class to add in dragging state

• Future API options

  • ignore
  • probably alternative touch behaviour

• Example:

 <div class="esl-scrollable-content" esl-drag-to-scroll="{axis: 'both'}">
     ...
 </div>