Add local auto-print utility to watch folder and print new files

[netpoint2]

Motivation

• Provide an opt-in local utility to automatically send newly added documents and images in a folder to the default printer to streamline printing workflows.

Description

• Add print_every_page.py, a polling-based folder watcher that detects new files with extensions .pdf, .txt, .png, .jpg, and .jpeg and sends them to the default system printer.
• Implement platform-aware printing commands using lp on macOS/Linux and PowerShell Start-Process ... -Verb Print on Windows, and include a --dry-run flag for safe previews.
• Add CLI parsing for folder, --interval, and --dry-run and input validation to ensure the target is a directory.
• Add README.md with usage examples, supported types, flags, and OS notes.

Testing

• Ran python3 -m py_compile print_every_page.py and it completed successfully.
• Ran python3 print_every_page.py --help and it printed the help text successfully.

---

Codex Task