Adds a stronger SDXL QR hidden-image workflow and separates reusable
blueprints from the runnable workflows, alongside node and installer updates.
- workflows/sdxl_qr_hidden_image_ultra_strong.json: new higher-strength
variant of the SDXL QR workflow.
- workflow_blueprints/: blueprint copies of the flux ghost, sd15 QR, sdxl QR,
and unified router graphs, kept separate from the executable workflows.
- illusion_nodes.py, install.bat, docs/WORKFLOWS.md, README.md: node and
install/documentation updates to match.
Geekatplay Dev
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