Dotnet 8 builds

[TheAngryByrd]

WHAT

🤖 Generated by Copilot at 511ea16

This pull request updates the project to support the experimental net8.0 target framework, using a new environment variable BuildNet8 to control the compilation. It also fixes some JSON and line ending issues, removes unused tools, and updates dependencies.

🤖 Generated by Copilot at 511ea16

net8.0 support added with conditions and tools autumn of .NET

🎯🛠️🧪

WHY

Might as well see what CI says.

HOW

🤖 Generated by Copilot at 511ea16

• Remove fake-cli and octonav tools and update paket tool to version 8.0.0-alpha002 in .config/dotnet-tools.json (link)
• Fix JSON syntax error in .config/dotnet-tools.json (link)
• Change label values for dotnet-version matrix in .github/workflows/build.yml and .github/workflows/test.yml to reflect current .NET versions (link, link)
• Add BuildNet8 environment variable to .github/workflows/build.yml and .github/workflows/test.yml to enable conditional compilation of net8.0 target framework (link, link)
• Add net8.0 to framework values in paket.dependencies to allow paket to resolve dependencies for net8.0 target framework (link, link)
• Add System.Security.Cryptography.Pkcs package to paket.dependencies to fix runtime error when using net8.0 target framework (link)
• Add NuGet.Versioning, NuGet.Common, and NuGet.Protocol packages to Build group in paket.dependencies to enable querying NuGet feed in build.fsx script (link)
• Add net8.0 to TargetFrameworks values in src/FsAutoComplete.Core/FsAutoComplete.Core.fsproj, src/FsAutoComplete.Logging/FsAutoComplete.Logging.fsproj, src/FsAutoComplete/FsAutoComplete.fsproj, and test/FsAutoComplete.Tests.Lsp/FsAutoComplete.Tests.Lsp.fsproj, with a condition that checks BuildNet8 environment variable (link, link, link, link)

[TheAngryByrd]

Hmm looks like 8rc2 is broke with tools https://github.com/dotnet/sdk/issues/35989

Guess we'll try rc3.

[baronfel]

@TheAngryByrd I think I've fixed the fantomas problems - they were actually because while fantomas did have a RollForward of major, the 8.x version is technically a prerelease - once I added the env var to allow prereleases to participate in rollfoward the tool began working. I think this is a UX bug and I'm going to ask Rich Lander's team to consider expanding the set of allowed SDKs/runtimes.