feat(ui): add galleries

[ancreat]

Type of change

• New feature (non-breaking change which adds functionality)

Description

Add galleries

Additional context

Fixes #2136

[lotusk08]

By this theme using Bootstrap, IMO, there's no need to add gallery features to display image collections by topic. You can try this simple structure:

{: .d-flex .justify-content-center }
Image 1 {: .me-2}
Image 2 {: .me-2}
Image ... {: .me-2}
Image 6

I’m using this for myself

[tis-starlight]

@lotusk08

By this theme using Bootstrap, IMO, there's no need to add gallery features to display image collections by topic. You can try this simple structure: ...

I believe this pull request addresses issue #2136, which pertains to the current behavior where all images within a post are grouped into a single lightbox gallery, regardless of their intended categorization.

With this update, images tagged with a specific gallery identifier (e.g., gallery1, gallery2, etc.) will now be grouped accordingly. This allows users to navigate only within the intended image set, ensuring that lightbox navigation is scoped to the designated gallery rather than encompassing all images in the post.