Update WIT extension to pull in work item types dynamically
Update WIT extension to pull in work item types dynamically

Microsoft/vso-extension-samples,Microsoft/vsts-extension-samples,srdjan-bozovic/vso-extension-samples,srdjan-bozovic/vso-extension-samples,Microsoft/vso-extension-samples,Microsoft/vsts-extension-samples,Microsoft/vso-extension-samples,Microsoft/vsts-extension-samples,srdjan-bozovic/vso-extension-samples