[Feature Request]: New module for App Configuration

[eriqua]

Description

Add new module for resource type Microsoft.AppConfiguration/configurationStores

• Start with the parent resource
• Add extensions: rbac, private endpoint, diagnostic settings, managed identity, tags, locks
• Add child resource module for configurationStores/keyValues

Ref: Azure resource reference https://docs.microsoft.com/en-us/azure/templates/microsoft.appconfiguration/configurationstores/keyvalues?tabs=bicep