Images: Add PhotoSwipe lightbox to all linked images

[andreiungurianu]

While working on the Gallery page for the Rosa 2 demo, @georgeolaru pointed out that we do not have a lightbox functionality for the images added in a gallery - either the default Gallery block or the Advanced Gallery block. This means that people can only click and be redirected to the full image url.

The proposal is to add this functionality - @georgeolaru mentioned PhotoSwipe as a potential solution.

[georgeolaru]

I tested the PhotoSwipe (MIT license) script through the implementation of the Lightbox with PhotoSwipe WordPress plugin and it's working really well.

I think it would provide a better user experience if we integrate and slightly customize the PhotoSwipe script directly into the Nova Blocks plugin, leaving the users with advanced use-cases to use the above-mentioned plugin.