Flyfish Viewer plain text sample

This file verifies that the text renderer handles prose, line breaks, ASCII tables,
and search-friendly content without loading a heavy document engine.

Format matrix:
- Office documents: preset-office
- Engineering attachments: preset-engineering
- Lightweight web files: preset-lite
- Complete internal workbench: preset-all

The preview should remain fast, selectable, zoomable, and printable.