• Added -sort flag (name, date, size)
• Added -show-covers flag to detect cover.jpg/folder.jpg and show as catalog cover
• Added -search flag for OpenSearch compliant recursive filename search
• Added -mime-map flag for custom file extension to MIME-type mapping
• Added -extract-metadata flag to extract Title and Author from EPUB and PDF files
• Expanded Catalog model to support new features and metadata
• Refactor Handler and makeFeed to use the new Catalog model
• Updated README.md and CHANGELOG.md with the new features