OCGV: Add diagnostics (show `Terminal.Gui` lib version and support forcing NetDriver)

[tig]

Summary of the new feature / enhancement

In developing modules dependent on OCGV it is painful not knowing what version of OCGV and Terminal.Gui are being used.

To this end, add:

• -Diagnostic which will show both the ConsoleGuiTools module version and the Terminal.Gui lib version on the status bar
• -UseNetDriver which will force Terminal.Gui to use NetDriver instead of CursesDriver (linux) or WindowsDriver (Windows).

Proposed technical implementation details (optional)

No response