- Implement lazy loading in all image shortcodes, enabled by default.
- Make alt attributes optional across all image shortcodes.
- Optimize HTML output by managing whitespace.
- Use `get_url` function to generate correct image paths
- Retrieve image dimensions with `get_image_metadata` function
- Update shortcodes: dimmable_image, dual_theme_image, and invertible_image
These changes reduce layout shifts.