Add Python script to automatically fill PDF forms with AcroForm fields:
- extract_fields(): Extract all form field names and types from PDF
- fill_pdf(): Fill PDF with values from JSON input
- Support for both list and dict JSON formats
- Checkbox values support (/On, /Off, /Ja, /Nein)
https://claude.ai/code/session_01Dq1f9hjJFq859ShW2kZ26R
