Fix: Handle missing getTotalSlides method in slider

[namankhare]

Fixes #86

Current Issue

• The update method in the tp-slider-count component throws a TypeError: e.getTotalSlides is not a function. This occurs because the getTotalSlides method is being called on a tp-slider element before the required JavaScript for the slider has been loaded, leading to the method being undefined at the time of invocation.
  

Fix

• This PR resolves the issue by ensuring the necessary JavaScript for the tp-slider component is loaded and initialized before any method calls are made.