Changes

PR #1428 by ksylvan: feat: Alphabetical case-insensitive sorting for groups and items

• Added alphabetical case-insensitive sorting for groups and items in Print method
• Imported sort and strings packages to enable sorting functionality
• Implemented stable sorting by creating copies of groups and items before sorting
• Enhanced display organization by sorting both groups and their contained items alphabetically
• Improved user experience through consistent case-insensitive alphabetical ordering