"View type definition" ability to show virtual window in-editor of `.bicep`-formatted types

For resource types, we currently link to the public template documentation in a browser window. This has the following disadvantages:
- It doesn't take into account changes between Bicep versions (you're always looking at "latest" - this doesn't necessarily match what your editor sees.
- It breaks your flow somewhat
- It doesn't work with editor tooling, and detailed information is hidden
- It doesn't teach you how to use Bicep types.

Now that we have the ability to express types in Bicep, it would be great to bring up a generated `.bicep` file containing the "decompiled" type info.

Start by reviewing the current “View type definition” behavior and the issue’s described ability to express types in Bicep. The work is done when resource types open as generated .bicep content in the editor, with information matching the editor’s Bicep version and usable by editor tooling.

Written by the indexing model from the issue text.