The Bicep Language Server should provide completions for import 'az@ by inspection of the OCI registry

[asilverman]

Overview

With the introduction of dynamic type loading we want the user experience in VSCode to change so that it gives package completions to the authors of a bicep file.

For example: When the author is typing the below trivia statement, the language server should provide intellisense about what are the available versions of the az provider at the time by querying the OCI registry. Likely it would be also nice to have a documentation string as part of the intellisense prompt telling the user what date the provider was released so we have a hint of what types are available in that provider version

import 'az@