[Matter] Add support for NO₂

Description

Add support for NO₂ sensors in the Matter integration

same scale as COV:

Hello!

I added this feature in this PR: Matter: Add No2 index sensor by Pierre-Gilles · Pull Request #2540 · GladysAssistant/Gladys · GitHub

To be tested on this Docker image (available in 10 minutes)

gladysassistant/gladys:add-matter-no2-index

It’s merged and it will be included in the next version of Gladys :slight_smile:

It’s live in Gladys Assistant 4.79: