Custom scaffolder action to create PagerDuty service

[t1agob]

Is your feature request related to a problem? Please describe.
The problem that I am trying to solve is of new service onboarding, i.e. when a new service gets created, I want to create a new PD service for it based on the PD team provided by user input.

Describe the solution you'd like
Create scaffolder action to create a PagerDuty Service from Backstage:

• pagerduty:create:service - which creates a pagerduty service

Additional context
Original issue raised by @Alok650 in #35. Broken down into two issues to reduce scope.

[t1agob]

@Alok650 This request is now implemented in the latest version of backend plugin.

To use the custom action in your templates follow the documentation here.

[Alok650]

Thanks @t1agob for taking it up on priority. will try it out and give feedback.