Add script for downloading and processing element emission spectra
from Wikimedia Commons.
- Read element definitions from get_images.txt
- Retrieve original spectrum images from Wikimedia Commons
- Download element spectrum PNG files automatically
- Generate standardized filenames using atomic metadata
- Resize images to 3840px width
- Crop images to 3840x540 panorama format
- Export processed files to wallpaper collection directory
- Report missing spectrum images
- Automate creation of element-themed desktop wallpapers
