[V4] Dev service RFlink

Hey!

First of all: thank you @Tlse-vins!
I’m dropping by here to share some updates.

Tests & corrections
I’m really proud to have completed the service tests while respecting the quality ratio:


The few remaining points are beyond my capacity, but I would be happy if someone could explain them to me.

I have added corrections, especially for the milight, whose color management remains unfortunately very imperfect to this day (roughly: I tried to convert the color picker values into 8-bit colors by approximation because that’s what the milights require).

PR
The status of the PR seems okay to me, let me know if something is missing
https://github.com/GladysAssistant/Gladys/pull/1204

I generated a test docker image for those who want to test. It has been running successfully at my place for a few days.

I’m waiting for your feedback, especially from those who have rflink gateway + device hardware (@peb?).

Documentation
WIP: I am writing the documentation and plan a small presentation video.