Bicep Console - View variable type

A way to verify/view what type a variable is, even something as simple as `somevar.gettype`. (Okay that's dotnet, probably would be something like `type(somevar)` )

Extracted from https://github.com/Azure/bicep/issues/18614

The issue names the Bicep Console but provides no source file, test, or entry point. First locate the Console implementation and how expressions are evaluated; done means a user can inspect a variable and see its type, with coverage for the requested behavior.

Written by the indexing model from the issue text.