Replace auto-cut toggle with --cut bit flags (default 011), wire flags through C/Ruby APIs, and document the new cut/debug-dump behavior in both READMEs.
Made-with: Cursor
Add data-kb-placeholder qr/barcode support with rqrcode and barby.
Scale QR to fit placeholder box (viewBox + meet) and barcode by height
with natural width. Declare barby and rqrcode runtime dependencies.
Made-with: Cursor
