[Feature Request] Add supports for `double-dash` arguments syntax

[filzrev]

Currently ConsoleAppFramework seems not support -- syntax that described on following URL.
https://learn.microsoft.com/en-us/dotnet/standard/commandline/syntax#the----token

And it seems there are no way to receive extra arguments as command parameters.

On Syntax Parsing Policy and Performance section describes the following statement.

While there are some standards for command-line arguments, such as UNIX tools and POSIX, there is no absolute specification. The Command-line syntax overview for System.CommandLine provides an explanation of the specifications adopted by System.CommandLine. However, ConsoleAppFramework, while referring to these specifications to some extent, does not necessarily aim to fully comply with them.

Adding double-dash( -- ) support against the above policy?

[neuecc]

Thank you for your suggestion.
Since it's not too parse-intensive and is a very useful feature (I also frequently use this syntax with dotnet run),
I'd like to think positively about supporting --.