U-1159 On-call calendar data source

[PetrHeinz]

Build on top of On-call calendar API: https://betterstack.com/docs/uptime/api/list-all-existing-on-call-calendars/

data "betteruptime_on_call_calendar" "this" {
  name = "My calendar" # You can omit this for a primary calendar
}
output "on_call_calendar" {
  value = data.betteruptime_on_call_calendar.this
}

Example output:

Apply complete! Resources: 0 added, 0 changed, 0 destroyed.

Outputs:

on_call_calendar = {
  "default_calendar" = true
  "id" = "43254"
  "name" = "My calendar"
  "on_call_users" = tolist([
    {
      "email" = "hello@betterstack.com"
      "first_name" = "Petr"
      "id" = "253425"
      "last_name" = "Heinz"
      "phone_numbers" = tolist([
        "+420123456789",
      ])
    },
  ])
}