Call any service in notification task

[kristjanbjarni]

Checklist

• I checked for similar existing requests (both open and closed) before posting.
• My request is generic, other users may benefit from it too.

Proposal

Currently you can only use notify.* and similar services for notifications. It would be much more flexible to be able to call any action or service for notifcations.

As an example I have a shell command action that I can use to send SMS directly to a phone but currently I can't use that for any notifications in Alarmo. It would look something like this in the Task editor in YAML mode:

service: shell_command.send_sms
data:
  number: 1234567890
  message: "{{open_sensors}}"