SOLID refactoring: Abstract prerequisite checks into IPrerequisiteVerifier to bypass physical OS checks and fix Gitea CI/CD test run

src/NixWslWrapper.Cli/Program.cs

@@ -3,6 +3,7 @@ using Microsoft.Extensions.DependencyInjection;
 using NixWslWrapper.Core.Interfaces;
 using NixWslWrapper.Infrastructure.IO;
 using NixWslWrapper.Infrastructure.Executors;
+using NixWslWrapper.Infrastructure.Services;
 
 namespace NixWslWrapper.Cli
 {
@@ -20,6 +21,7 @@ namespace NixWslWrapper.Cli
             return new ServiceCollection()
                 .AddSingleton<IStreamCopier, ThreadedStreamCopier>()
                 .AddSingleton<ICommandExecutor, WslCommandExecutor>()
+                .AddSingleton<IPrerequisiteVerifier, WslPrerequisiteVerifier>()
                 .AddSingleton<CliController>()
                 .BuildServiceProvider();
         }