Add required module artefact exclusions

[PrzemyslawKlys]

Summary

• add per-artefact RequiredModulesExcludeModuleName support for required-module bundling
• skip transitive PowerShell runtime/module-manager dependencies by default (Microsoft.PowerShell.*, PackageManagement, PowerShellGet, PSReadLine)
• document artefact-only exclusions and cover configuration/build behavior with regression tests

Validation

• dotnet test .\PowerForge.Tests\PowerForge.Tests.csproj --filter "FullyQualifiedNameArtefactConfigurationFactoryTests|FullyQualifiedNameArtefactBuilderLayoutTests|FullyQualifiedName~ModulePipelineDependencyMetadataProviderTests" --no-restore
• dotnet test .\PowerForge.Tests\PowerForge.Tests.csproj --filter "FullyQualifiedNameModulePipelineRegressionParityTests|FullyQualifiedNameModulePipelineRequiredModulesResolutionTests|FullyQualifiedName~RequiredModuleResolutionEngineTests" --no-restore
• git diff --check