Create light groups from the Lovelace UI

Tags: #<Tag:0x00007f78073a1840> #<Tag:0x00007f78073a1598>

It would be great if the Light Group functionality could be extended to be used from the Lovelace UI instead of the YAML config. While I am comfortable using YAML to create device groups, some people are not, so a UI implementation of the group functionality would save a lot of manual config changes. While UI cards grouping lights together is fine, it does not allow proper brightness and color control.