Add support for azure devops pipeline scheduling

[parberge]

Like github actions, azure devops pipeline lack the ability to schedule a workflow run. It's either scheduled cron style in the workflow or start the workflow directly.

Open questions:

1. Could we add this without major rewrites of existing stuff
2. Limit this feature to only support repos hosted on GitHub; The idea is that if we can reuse most of the stuff about importing the repos etc

[cfarvidson]

@parberge Nice.

1. Could we add this without major rewrites of existing stuff

I think so. We could add this parallell to github actions.

2. Limit this feature to only support repos hosted on GitHub; The idea is that if we can reuse most of the stuff about importing the repos etc

I have limited knowledge about how Azure devops works.

[cfarvidson]

Azure devops seems to have webhook support https://learn.microsoft.com/en-us/azure/devops/service-hooks/create-subscription?view=azure-devops

[parberge]

https://azure.microsoft.com/en-us/pricing/details/devops/azure-devops-services/