Scaffold required resource snippet based on the resourceType & apiVersion

[SenthuranSivananthan]

Is your feature request related to a problem? Please describe.
It's time consuming to figure out which fields are required when a new resource is being created. I would like to depend on Intellisense and auto-complete the aid with this discovery.

Describe the solution you'd like
My suggestion:

1. I enter the type & api version: resource stg 'Microsoft.Storage/storageAccounts@2019-06-01'
2. Select auto complete prompts for { }
3. The body of the resource is automatically created with all required fields based on the type and apiVersion, i.e.

resource stg 'Microsoft.Storage/storageAccounts@2019-06-01' = {
    name: ''
    kind:''
    sku: {
        name:''
    }
    properties: {
        accessTier: ''
    }
    location: ''
}

This helps with discovery and expedites creating resources.

This experience can also be expanded for modules.

[majastrz]

With the way completions and our type system work today, we can very easily generate a contextual snippet that would contain all the required properties that is relevant to the context that we're in. The difficult part will be ensuring that we preserve the user's indentation and formatting when we generate a multi-line snippet.

Open Questions

1. Should these be recursive or only populate required properties one level at a time. Or provide an option for both?
2. How would you prefer to trigger this behavior. Should it be available via a completion or a code fix/action?

[SenthuranSivananthan]

1. I think it should be recursive given that many of the required fields are already 1 level deep in the properties. Should we assume that it's a create operation since the required fields differ for update operations.

2. I prefer it directly in code completion so that it's part of the typing gesture for creating the resource.

[MarcusFelling]

Prerequisite: #71