Add support for scheduling valve domain entities

[marcjay]

Checklist

• I checked for similar existing requests (both open and closed) before posting.
• My request is generic, other users may benefit from it too.
• I will participate in further discussion about this feature and can test it (if requested) once it's done.

Proposal

I've got some valve entities that I'd love to create a schedule for, but can see that the domain is not within the currently supported list.

Would you accept a PR that added support for this relatively new domain?

I'm aware of #808 (comment) so if it's not a good time for a PR that's no problem.

Additional info

Proposing to add the new domain, using the existing domains (e.g. cover) as a reference. Adding translations where able.

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 7 days

[marcjay]

Do you have any thoughts on this @nielsfaber ? Thanks

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 7 days

[marcjay]

One last attempt on this before it gets auto-closed. cc: @nielsfaber

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 7 days