Add support for Azure Spring Cloud

Sample invocation
```
$ dotnew new stwebapi --azure-support
```

Spring example:
```
https://start.spring.io/#!type=maven-project&language=java&platformVersion=2.3.10.RELEASE&packaging=jar&jvmVersion=11&groupId=com.example&artifactId=demo&name=demo&description=Demo%20project%20for%20Spring%20Boot&packageName=com.example.demo&dependencies=azure-support
```