Rename command-line option?

The command line switch to specify the language is `--language`. However, the value accepted for C# is `dotnet`. .NET is the ecosystem, not the _language_ - a user could be using .NET with VB.NET or F#. Given that `.csproj` files are searched for, VB.NET and C# are not supported by the tool. Possible options: 1. Remove `dotnet` and replace with `csharp` 2. Add `csharp` and make `dotnet` an alias for it 3. Remove `dotnet` and replace with `csharp` and add `fsharp` and `vb` I would suggest 1 if we don't care about backwards compatibility, otherwise 2. 3 could be done if/when the need arises.