View images in a lightbox rather than new tab
## Context
This issue is the first step towards a vision of viewing image within GitLab:
1. This issue
2. View images in a markdown table with pagination https://gitlab.com/gitlab-org/gitlab/-/issues/377399
3. View gallery of images in markdown table https://gitlab.com/gitlab-org/gitlab/-/issues/255621/
4. View gallery in design management https://gitlab.com/gitlab-org/gitlab/-/issues/255621/
## Steps for Closure
* [x] Come to agreement on ~"group::knowledge" ownership
* [x] Create and agree on final designs
* [x] Carve out and develop :thumbsup:
## Problem
When viewing an image in GitLab, the image opens in a new tab. I lose the context of where I was.

## Proposal
When clicking on images within GitLab, (for example in comments, MRs, issue body...) open the image in a light box style:
https://gitlab.com/gitlab-org/gitlab/-/issues/377398/designs/Lightbox.png
This reuses elements of design management
issue