khanhduyvt0101/workflows ? reverse-engineered prompt

Build me a clean GitHub ready collection of document automation workflows, mainly for PDF processing and data extraction.

I want a simple README driven project that showcases a set of n8n workflows people can download and import, with clear sections for things like invoice extraction, invoice approval, and other document handling use cases. Each workflow should feel easy to understand for someone who just wants to automate messy PDFs into useful data, like Google Sheets rows, Google Docs, or Slack alerts.

Please also include placeholder folders or starter structure for Zapier and Make so the repo feels ready to grow later, even if n8n is the main focus for now. Make the README friendly, practical, and easy to scan, with quick start steps, what each workflow does, and what services it uses. If you need to look up current docs online while wiring the examples together, go ahead.