Add support for navigation bullets/dots in the tp-lightbox component

[nirav7707]

Enhance the tp-lightbox component by adding support for navigation bullets/dots.

Required Subcomponents:

tp-lightbox-nav:

• Container for the navigation bullets/dots.

tp-lightbox-nav-item:

• Represents an individual navigation bullet/dot.
• Should indicate the active slide and handle click events for navigation.

Cc: @junaidbhura