Fix config persistence (wifi)

What's Changed

• Fix mqtt max brightness by @Samt43 in #39
• Fix undefined status that stays forever in home assistant after autoreconnect happens by @Samt43 in #40
• Implement Breathing effect, permitting the user to chose it's own luminosity by @Samt43 in #41

New Contributors

• @Samt43 made their first contribution in #39

Full Changelog: v1.8.6...v1.8.7