Implement light effects on gateway LEDs

[devbis]

Home Assistant MQTT discovery component can set effects for a light entity.
https://www.home-assistant.io/integrations/light.mqtt/#effect_list

Thoughts: we could implement light effects on the app side like blinking or similar.
Possible initial effects:

• Flashing
• Pulsing
• Rainbow

Here is an example how it looks like in lovelace:

[sledzik1984]

+1 for blinking!

[nightmare04]

+1 for blinking!

[blackie333]

+1 for pulsing :)