Add DirectFromScope Method

To complement existing functionality regarding parallel processing of resource discovery based on a specified resource scope, this release adds a new DirectFromScope Method which can be used to generate new AzState objects from the original scope-level response.

This can be useful in situations where the scope level response contains the full resource definition. An example of this is obtaining Policy Definitions at a given scope.

This release also includes minor updates for the default constructors [AzState]::new(), [AzState]::Update() and [AzState]::Initialize() methods.

This also includes the first stages of providing greater control over "CacheMode" to ensure all Resources used to generate an AzState hierarchy can be refreshed from Cache or API based on user preference.