Visual Basic support in OData CLI?

[habbes]

OData CLI documentation states that it supports generating Visual Basic client code

However it does not show you how to generate VB code. And when looking at the source code, it seems that we've hardcoded C# language option:

• https://github.com/OData/ODataConnectedService/blob/master/src/Microsoft.OData.Cli/GenerateCommand.cs#L379
• https://github.com/OData/ODataConnectedService/blob/master/src/Microsoft.OData.Cli/GenerateCommand.cs#L393

The documentation should reflect what we support. If we don't intend to support VB, we should update the doc (we should probably update the doc regardless and update it when we add support again). If this gap was not intentional, we should implement VB support.