Adding device feature category: NO₂, SO₂ and O₃

[pierre-gilles]

I am closing this post as the feature is available in Gladys Assistant 4.86:

Gladys 4.86: the biggest release in the project's history

Hi everyone! Super excited to release Gladys Assistant 4.86. It’s simple, it’s the biggest version since the start of the project, with 68 PRs merged in one week It’s just incredible, and it shows the new pace we can keep with AI. The goal is now clear: catch up with and surpass Home Assistant I’ll talk about these 68 new features here: Thanks to all the contributors!!