Add support for effect modes of Tint ZigBee color light bulbs (Müller Licht)

Outline

I am using a couple of ZigBee RGB lights by tint in my OpenHab setup for a couple of years now. The starter kit came with a remote which also has buttons for certain effects of the lights like "party", "sunset" etc. The effects are triggered by the remote, but generated in the light bulbs themselves (they continue working even if I take out the batteries of the remote).

After a bit of searching, I found this thread on GitHub about integrating support for the remote into deCONZ. This post details the finding about remote including the effect buttons. The essence is this, I think:

The six scene buttons send a Write Attributes to manufacturer-specific (0x121b) uint8 attribute 0x4005 of the Basic cluster. The value indicates the scene, although the order is a bit odd: Read: 3, Day: 1, Disco: 2, Night: 6, Fire: 4, Love: 5.

I don't want to control anything with the remote via OpenHab, but I would like to be able to trigger the effect modes on my Tint light bulbs via OpenHab. In OpenHab, I can only see the two channels "Color Temperature" and "Color", but nothing to trigger the effect. Is there any way to achieve that?

I opened this issue per this request.

Configuration

Configuration	Description
Coordinator used	BitronVideo AV 2010/10
openHAB version	3.2.0
Hardware	Raspberry Pi Zero 2 W
Memory	512 MB
Java version	11
Devices	MLI ZBT-ExtendedColor `00158D0001FDF3BD`
	MLI ZBT-Remote-ALL-RGBW `00158D000172CC66`

XML device files

MLI ZBT-ExtendedColor 00158D0006E49C8D.xml MLI ZBT-Remote-ALL-RGBW 00158D000172CC66.xml

openhab / org.openhab.binding.zigbee