Generate professional PDF invoices from JSON data. Use when the user needs to create an invoice, billing document, or payment request with company/client details and line items.
Initial release: Generate PDF invoices from structured JSON. - Converts invoice data in JSON format to professional PDF files. - Supports multiple input methods: stdin, file path, or saved config. - Stores generated invoices in a user-specified directory. - Handles auto-versioning for duplicate filenames. - Provides clear error handling for invalid input or PDF generation issues.