v1.2.3

What's Changed

Adds a font preview to the GUI and improves the test pattern.

Enhancements

• GUI: Add font preview to selection combobox by @FaBjE in #56
• Improve sample pattern by @maresb in #55

Infrastructure and code cleanup

• Clean up barcodes by @maresb in #25
• Add unit tests for render engines by @tomers in #32
• GUI tests by @tomers in #37
• Update dev environment by @FaBjE in #52
• Enable "unsafe" ruff fixes by @maresb in #59

Full Changelog: v1.2.2...v1.2.3