[snippet] Snippet snippet-redraw-url and snippet-redraw-event data attributes.

[Machy8]

Describe the problem

• This would allow a snippet to redraw itself by either dispatching an event or calling the redrawSnippet method.
• If snippet has an URL, it will send a get request to that URL, get HTML response and redraw itself.
• This would eliminate a lot of boilerplate and would simplify a lot of things like:
  • Add item into the cart
  • Refresh cart, delivery calculation, discounts and everything like that on website by triggering one event cart:updated through event dispatcher
  • Also, if any event inside snippet-redraw-event is triggered and it receives url address, it can trigger the redraw and override the default address. It could actually pass the entire config for javascript request.

Describe the proposed solution

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Alternatives considered

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Importance

would make my life easier