https://daveklloyd.medium.com/azure-test-plans-test-cases-39aa1fb1e9b7
https://daveklloyd.medium.com/azure-test-plans-test-plans-212fbaaa68e3

https://docs.microsoft.com/en-us/azure/devops/test/create-a-test-plan?view=azure-devops#add-a-requirement-based-test-suite-and-select-backlog-items-to-test