Scene sets

Establish the concept of a scene set.

This has probably been thought of before, but I couldn’t find the topic…

Problem statement:
When creating scenes for a room, one typically create several scenes. These all end up having an “on” state, and have to be maintained separately. This makes it hard to visualize which scene is active in, for example, a glance card.

Resolution:
Create a scene collection concept, i.e. a scene set. When one scene is activated, the others are turned off. Potentially it could also be easier to configure as the entities which should be included in the set can be stated once, while the values in the concrete scenes can be edited in a list format. It could also be easy to split these into several files, making it easier to navigate. Could be possible to establish a scene set entity, long term.
Example configuration:

- type: scene_set
  name: living_room
  names: #entity_name: Friendly name
    - day: Day
	- evening: Evening
	- night: Night
  entities:
    - entity: light.spots
	  state:
	    - on
		- on
		- on
	  brightness_pct:
	    - 0
	    - 70
		- 5
	  transition: 5 #Same transition time for all scenes
	- entity: cover.window
	  state: open #open for all scenes
	  current_position:
	    - 50
		- 100
		- 20