Address comments from Azure#771 review (Azure#807)

* Fixes for comments on Azure#771

* Simplify CanConvertToArmJson logic

Support target scopes for modules (Azure#771)

* Add scope type

* Very basic emitter, no validation

* Attach function arguments to scope

* Add ability to set target scope

* Add example create-rg-lock-role-assignment

* Fix up some tests

* Pull in latest types, fix up tests

* Check for multiple instances of targetScope declaration

* Create INamedDeclarationSyntax

* Tidy up

* Add some tests

* Update docs for scopes

* Avoid outputting unrepresentible function types to JSON

* Tidy up, add some comments

* Combine AzResourceScope & ResoureScopeType enums

* Fix vscode e2e test

Fix build job dependency (Azure#476)

Increment version to 0.1 (Azure#385)