Add RoslynAnalyzers with opt-in properties

[JoeRobich]

Ship Roslyn analyzers (BannedApi, PublicApi, PerformanceSensitive, ResxSourceGenerator) in the SDK

This change bundles four additional Roslyn analyzer packages into the SDK layout, following the same pattern used for CodeStyle and NetAnalyzers today:

• Microsoft.CodeAnalysis.BannedApiAnalyzers
• Microsoft.CodeAnalysis.PublicApiAnalyzers
• Microsoft.CodeAnalysis.PerformanceSensitiveAnalyzers
• Microsoft.CodeAnalysis.ResxSourceGenerator

Opt-in properties

All four are opt-in (default false). Users enable them by setting the corresponding MSBuild property:

Property	Analyzer
EnableBannedApiAnalysis	BannedApiAnalyzers
EnablePublicApiAnalysis	PublicApiAnalyzers
EnablePerformanceSensitiveAnalysis	PerformanceSensitiveAnalyzers
EnableResxSourceGeneration	ResxSourceGenerator

NuGet package dedup

When a project also references one of these packages directly via NuGet, the SDK-bundled copy is automatically removed to avoid duplicate diagnostics. This is handled entirely on the SDK side (via the _ResolveSdkAnalyzerConflicts target) so that it works correctly even against older NuGet package versions that have no awareness of the SDK-bundled analyzers.

What changed

• redist.csproj — Added PackageReference entries (with ExcludeAssets="All" GeneratePathProperty="true") so the packages are downloaded for layout extraction.
• GenerateLayout.targets — Extended PublishNETAnalyzers to copy analyzer DLLs and build assets into roslynanalyzers/ subdirectories of the SDK layout.
• Microsoft.NET.Sdk.Analyzers.targets — Added Enable* property defaults, <Import> of each package's .props/.targets, <Analyzer> item groups gated on the Enable* properties, and the _ResolveSdkAnalyzerConflicts dedup target.
• Version.Details.xml / Version.Details.props / Directory.Packages.props — Added version entries for the three new packages (PublicApiAnalyzers already existed).