Azure-functions-core-tools: New command: func azure functionapp create

[anthonychu]

Needs discussion: A simplified command for creating function apps. Creates storage and app insights as well. Calls az behind the scenes.

func azure functionapp create $functionAppName --location $regionName

Automatically creates storage and app insights.

Optional params:

• --os [windows|linux] - defaults to linux unless not supported for runtime (inspect local functions folder for runtime/language)
• --sku [consumption|premium] - defaults to consumption
• --storage-account-name $storageAccountName - if missing, automatically create
• --create-app-insights [true|false] - defaults to true

Also support a wizard to prompt for missing parameters.

[ggailey777]

Note that this would make the command line experience basically similar to the Visual Studio Code Functions extension experience when completing the Functions quickstart.