v0.4.0

New features and enhancements

• Use NiceGUI 2.3.0 (#20 by @rodja)
• Show network events (down, good, bad) (#19 by @rodja, @falkoschindler)
• Show On Air debug logs (#18 by @rodja)
• Improve startup (#17 by @rodja)
• Rename "air_link" service to "air-link" (#16 by @rodja)