roslyn-ls: init at 4.10.0-2.24102.11

[konradmalik]

Description of changes

VSCode C# Dev Toolkit released in 2023 introduced a new roslyn-based LSP server.

In this PR I propose to introduce this underlying LSP server to nixpkgs.
roslyn-ls is already integrated in neovim via a new plugin as well an ongoing effort to integrate it into emacs.

There is also a thread in nvim-lspconfig that can also shine a bit of light on the history of this server.

The release process of this server is a bit convoluted, but my TL;DR understanding is:

• the server is hosted in dotnet/roslyn repository
• dotnet/roslyn repo creates a tag VSCode-CSharp-2.16.24 which builds this server and pushes it to nuget (not sure about that but such tags are being created on that repo and the server is for sure published to nuget)
• version of the server is based on the general roslyn version, not vscode-csharp version
• dotnet/vscode-csharp bumps the roslyn-ls version and tags a new release - 2.16.24 (also not sure about that but tags in vscode-csharp match tags in dotnet/roslyn)

Also related to naming - wanted to use roslyn but it's already used in nixpkgs so I went with roslyn-ls.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.05 Release Notes (or backporting 23.05 and 23.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/prs-ready-for-review/3032/3391