Implement NetCore

[viferga]

We should implement NetCore with nonguix (not yet bootstrapable).

Here are the TODOs:

• Add a working version of nonguix channel:
  1. https://github.com/metacall/distributable/blob/b3bf8462fb74391e4382ca14b92bb38374b1c713/channels/channels.scm#L24
  2. https://github.com/metacall/distributable/blob/b3bf8462fb74391e4382ca14b92bb38374b1c713/.guix-channel#L27
• Uncomment netcore dependencies: https://github.com/metacall/distributable/blob/b3bf8462fb74391e4382ca14b92bb38374b1c713/source/metacall.scm#L70
• Implement NetCore SDK and Runtime: https://github.com/metacall/distributable/blob/b3bf8462fb74391e4382ca14b92bb38374b1c713/source/metacall.scm#L240
  Note: We are using the SDK from nonguix by now, in the future we can implement the runtime.
• Build NetCore in depends phase: https://github.com/metacall/distributable/blob/b3bf8462fb74391e4382ca14b92bb38374b1c713/scripts/deps.sh#L26
• Make it work properly with all base dependencies for the C# Loader and export nuget in order to allow metacall nuget ... command.
• Implement tests for C#: https://github.com/metacall/distributable/tree/master/tests

[viferga]

Currently nonguix is almost working but I am getting this error:

/tmp/guix-build-metacall-0.5.4.drv-0/core-0.5.4/source/loaders/cs_loader/netcore/source/project.csproj : error NU1101: Unable to find package System.Collections.Immutable. No packages exist with this id in source(s): /gnu/store/2hdcy8hj703fqk92wg58f15j7r2i44b3-dotnet-5.0.201/share/dotnet/shared/Microsoft.NETCore.App/5.0.4, /tmp/.nuget/nupkgs, /tmp/.nuget/packages
/tmp/guix-build-metacall-0.5.4.drv-0/core-0.5.4/source/loaders/cs_loader/netcore/source/project.csproj : error NU1101: Unable to find package System.Memory. No packages exist with this id in source(s): /gnu/store/2hdcy8hj703fqk92wg58f15j7r2i44b3-dotnet-5.0.201/share/dotnet/shared/Microsoft.NETCore.App/5.0.4, /tmp/.nuget/nupkgs, /tmp/.nuget/packages
/tmp/guix-build-metacall-0.5.4.drv-0/core-0.5.4/source/loaders/cs_loader/netcore/source/project.csproj : error NU1101: Unable to find package System.Reflection.Metadata. No packages exist with this id in source(s): /gnu/store/2hdcy8hj703fqk92wg58f15j7r2i44b3-dotnet-5.0.201/share/dotnet/shared/Microsoft.NETCore.App/5.0.4, /tmp/.nuget/nupkgs, /tmp/.nuget/packages
/tmp/guix-build-metacall-0.5.4.drv-0/core-0.5.4/source/loaders/cs_loader/netcore/source/project.csproj : error NU1101: Unable to find package System.Runtime.CompilerServices.Unsafe. No packages exist with this id in source(s): /gnu/store/2hdcy8hj703fqk92wg58f15j7r2i44b3-dotnet-5.0.201/share/dotnet/shared/Microsoft.NETCore.App/5.0.4, /tmp/.nuget/nupkgs, /tmp/.nuget/packages
/tmp/guix-build-metacall-0.5.4.drv-0/core-0.5.4/source/loaders/cs_loader/netcore/source/project.csproj : error NU1101: Unable to find package System.Text.Encoding.CodePages. No packages exist with this id in source(s): /gnu/store/2hdcy8hj703fqk92wg58f15j7r2i44b3-dotnet-5.0.201/share/dotnet/shared/Microsoft.NETCore.App/5.0.4, /tmp/.nuget/nupkgs, /tmp/.nuget/packages
/tmp/guix-build-metacall-0.5.4.drv-0/core-0.5.4/source/loaders/cs_loader/netcore/source/project.csproj : error NU1101: Unable to find package System.Threading.Tasks.Extensions. No packages exist with this id in source(s): /gnu/store/2hdcy8hj703fqk92wg58f15j7r2i44b3-dotnet-5.0.201/share/dotnet/shared/Microsoft.NETCore.App/5.0.4, /tmp/.nuget/nupkgs, /tmp/.nuget/packages

Here's the complete log:
output.txt

[viferga]

I am linking here the issue in nonguix repo:
https://gitlab.com/nonguix/nonguix/-/issues/131