PR Summary

This pull request introduces a new Lightbox gallery feature to the project. The Lightbox gallery is defined in a new file internal/testing/lightbox.qmd, which includes a set of images grouped together for display. The gallery is styled using CSS classes to ensure a consistent and visually appealing presentation.

Key changes include:

• Creation of a new Lightbox gallery in internal/testing/lightbox.qmd with three images, each wrapped in a responsive container.
• Updates to the site/_quarto.yml file to include the new Lightbox gallery in the website configuration.
• Addition of new CSS styles in site/styles.css to customize the appearance of the Lightbox gallery, including button colors, hover effects, and description backgrounds.

These changes enhance the visual presentation of images on the site and provide a more interactive user experience.

Test Suggestions

• Verify that the Lightbox gallery displays correctly with all images in internal/testing/lightbox.qmd.
• Check the responsiveness of the Lightbox gallery on different screen sizes.
• Test the CSS styling changes to ensure buttons and hover effects appear as expected.
• Ensure that the Lightbox gallery is correctly linked and accessible from the main site navigation.
• Validate that the Lightbox functionality works across different browsers.