Template alarm panel

[alistairg]

Description:

Adding support for template alarm panel. Resurrecting PR #24997, with changes suggested by @MartinHjelmare incorporated.

Pull request with documentation for home-assistant.io (if applicable): home-assistant/home-assistant.io#9801

Example entry for configuration.yaml (if applicable):

alarm_control_panel:
  - platform: template
    panels:
      alarmdecoder:
        friendly_name: "Virtual Alarm Panel"
        code_arm_required: false
        value_template: "{{ states('alarm_control_panel.alarm_panel') }}"
        disarm:
          service: alarm_control_panel.alarm_disarm
          data:
            entity_id: alarm_control_panel.alarm_panel
            code: !secret alarm_code
        arm_away:
          service: alarm_control_panel.alarm_arm_away
          data:
            entity_id: alarm_control_panel.alarm_panel
            code: !secret alarm_code
        arm_home:
          service: alarm_control_panel.alarm_arm_home
          data:
            entity_id: alarm_control_panel.alarm_panel
            code: !secret alarm_code
        arm_night:
          service: alarm_control_panel.alarm_arm_night
          data:
            entity_id: alarm_control_panel.alarm_panel
            code: !secret alarm_code

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the development checklist

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in home-assistant.io

If the code does not interact with devices:

• Tests have been added to verify that the new code works.

[probot-home-assistant]

Hey there @PhracturedBlue, mind taking a look at this pull request as its been labeled with a integration (template) you are listed as a codeowner for? Thanks!

[MartinHjelmare]

Looks good! Just some clean up.

[MartinHjelmare]

Awesome!