Support Aqara light controller ZNTGMK12LM

[LiZhenhuan1019]

link to the device: https://www.aqara.cn/Intelligent-dimming-module-T1-(0%EF%BD%9E10V)_overview

[Koenkk]

Could you also submit a picture for the docs? This can be done by:

1. Create a fork by clicking here
2. Go to the public/images/devices directory, Add file -> Upload files
3. Upload the files and press Commit changes
4. Press Contribute -> Open pull request -> update title/description -> Create pull request

Make sure that:

• The filename is ZNTGMK12LM.png
• The size is 512x512
• The background is transparent (use e.g. Adobe remove background)

[Koenkk]

Thanks!