Slay PDF v0.1.0

Initial public release of Slay PDF.\n\nHighlights:\n- Static, client-side browser PDF editor at https://slaypdf.com/\n- Merge, split, delete, reorder, resize, crop, rotate, sign, annotate, redact, posterise, OCR and export workflows\n- No account required for local editing workflows\n- AGPL-3.0 source release with Nix development shell and GitHub Pages deployment