Add delay action option in automations

[MartinHjelmare]

• The delay action takes a data parameter seconds which is the time in seconds to delay the next action in the automation.
• Use the action like this:

automations:
  - name: test
    trigger:
      - type: event
        id: camacq_start_event
    action:
      - type: command
        id: start_imaging
      - type: automations
        id: delay
        data:
          seconds: 5.0
      - type: command
        id: stop_imaging