- Implemented `get_filenames` command in `batch_extractor.py` to extract file names from a specified directory and generate a dated hash for each file.
- Updated README.md with instructions for using the new command.
- Enhanced PDF generation in `build_pdf.py` by modifying file naming conventions to include article and size.
- Added example PowerShell script for batch processing tasks.
- Introduced new example Excel file for user reference.
