[Feature Request]: Add Microsoft.Cdn modules

[DanielLarsenNZ]

Description

Please add Microsoft.Cdn modules for Azure Front Door Standard and Premium. Some good examples here: https://github.com/Azure/azure-quickstart-templates/blob/master/quickstarts/microsoft.cdn/front-door-standard-premium-app-service-public/main.bicep

[ChrisSidebotham]

Closing as completed with #2487