Move Extensiblity into API/wix

src/.editorconfig renamed

src/api/wix/CSharp.Build.props renamed

src/api/wix/Custom.Build.props renamed

src/api/wix/Directory.Build.props renamed

src/api/wix/Directory.Build.targets renamed

src/api/wix/README-Extensibility.md renamed

src/api/wix/WixToolset.Extensibility.sln renamed

src/api/wix/WixToolset.Extensibility/AssemblyInfo.cs renamed

src/api/wix/WixToolset.Extensibility/BaseBinderExtension.cs renamed

src/api/wix/WixToolset.Extensibility/BaseBurnBackendBinderExtension.cs renamed

src/api/wix/WixToolset.Extensibility/BaseCompilerExtension.cs renamed

src/api/wix/WixToolset.Extensibility/BaseExtensionCommandLine.cs renamed

src/api/wix/WixToolset.Extensibility/BaseExtensionData.cs renamed

src/api/wix/WixToolset.Extensibility/BaseExtensionFactory.cs renamed

src/api/wix/WixToolset.Extensibility/BaseLayoutExtension.cs renamed

src/api/wix/WixToolset.Extensibility/BaseLibrarianExtension.cs renamed

src/api/wix/WixToolset.Extensibility/BaseLinkerExtension.cs renamed

src/api/wix/WixToolset.Extensibility/BasePreprocessorExtension.cs renamed

src/api/wix/WixToolset.Extensibility/BaseResolverExtension.cs renamed

src/api/wix/WixToolset.Extensibility/BaseWindowsInstallerBackendBinderExtension.cs renamed

src/api/wix/WixToolset.Extensibility/CompilerConstants.cs renamed

src/api/wix/WixToolset.Extensibility/Data/BindStage.cs renamed

src/api/wix/WixToolset.Extensibility/Data/BurnPlatforms.cs renamed

src/api/wix/WixToolset.Extensibility/Data/CabinetBuildOption.cs renamed

src/api/wix/WixToolset.Extensibility/Data/CustomActionPlatforms.cs renamed

src/api/wix/WixToolset.Extensibility/Data/ExtensionCommandLineSwitch.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IBindContext.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IBindFileWithPath.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IBindPath.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IBindResult.cs renamed

src/api/wix/WixToolset.Extensibility/Data/ICommandLineArguments.cs renamed

src/api/wix/WixToolset.Extensibility/Data/ICommandLineCommand.cs renamed

src/api/wix/WixToolset.Extensibility/Data/ICommandLineContext.cs renamed

src/api/wix/WixToolset.Extensibility/Data/ICompileContext.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IComponentKeyPath.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IDecompileContext.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IDecompileResult.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IDelayedField.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IExpectedExtractFile.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IFileFacade.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IFileSystemContext.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IFileTransfer.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IIncludedFile.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IInscribeContext.cs renamed

src/api/wix/WixToolset.Extensibility/Data/ILayoutContext.cs renamed

src/api/wix/WixToolset.Extensibility/Data/ILibraryContext.cs renamed

src/api/wix/WixToolset.Extensibility/Data/ILinkContext.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IPreprocessContext.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IPreprocessResult.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IResolveContext.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IResolveFileResult.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IResolveResult.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IResolvedCabinet.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IResolvedDirectory.cs renamed

src/api/wix/WixToolset.Extensibility/Data/ITrackedFile.cs renamed

src/api/wix/WixToolset.Extensibility/Data/IUnbindContext.cs renamed

src/api/wix/WixToolset.Extensibility/Data/PossibleKeyPathType.cs renamed

src/api/wix/WixToolset.Extensibility/Data/TrackedFileType.cs renamed

src/api/wix/WixToolset.Extensibility/DecompilerConstants.cs renamed

src/api/wix/WixToolset.Extensibility/DecompilerExtension.cs renamed

src/api/wix/WixToolset.Extensibility/ExtensionHelper.cs renamed

src/api/wix/WixToolset.Extensibility/IBackend.cs renamed

src/api/wix/WixToolset.Extensibility/IBackendFactory.cs renamed

src/api/wix/WixToolset.Extensibility/IBinderExtension.cs renamed

src/api/wix/WixToolset.Extensibility/IBurnBackendBinderExtension.cs renamed

src/api/wix/WixToolset.Extensibility/ICompilerExtension.cs renamed

src/api/wix/WixToolset.Extensibility/IDecompilerExtension.cs renamed

src/api/wix/WixToolset.Extensibility/IExtensionCommandLine.cs renamed

src/api/wix/WixToolset.Extensibility/IExtensionData.cs renamed

src/api/wix/WixToolset.Extensibility/IExtensionFactory.cs renamed

src/api/wix/WixToolset.Extensibility/IFileSystemExtension.cs renamed

src/api/wix/WixToolset.Extensibility/IInspectorCore.cs renamed

src/api/wix/WixToolset.Extensibility/IInspectorExtension.cs renamed

src/api/wix/WixToolset.Extensibility/ILayoutExtension.cs renamed

src/api/wix/WixToolset.Extensibility/ILibrarianExtension.cs renamed

src/api/wix/WixToolset.Extensibility/ILinkerExtension.cs renamed

src/api/wix/WixToolset.Extensibility/IMessageListener.cs renamed

src/api/wix/WixToolset.Extensibility/IPreprocessorExtension.cs renamed

src/api/wix/WixToolset.Extensibility/IResolverExtension.cs renamed

src/api/wix/WixToolset.Extensibility/IUnbinderExtension.cs renamed

src/api/wix/WixToolset.Extensibility/IWindowsInstallerBackendBinderExtension.cs renamed

src/api/wix/WixToolset.Extensibility/IWindowsInstallerBackendDecompilerExtension.cs renamed

src/api/wix/WixToolset.Extensibility/InspectorExtension.cs renamed

src/api/wix/WixToolset.Extensibility/Services/IBackendHelper.cs renamed

src/api/wix/WixToolset.Extensibility/Services/IBurnBackendHelper.cs renamed

src/api/wix/WixToolset.Extensibility/Services/ICommandLine.cs renamed

src/api/wix/WixToolset.Extensibility/Services/ICommandLineParser.cs renamed

src/api/wix/WixToolset.Extensibility/Services/IExtensionManager.cs renamed

src/api/wix/WixToolset.Extensibility/Services/IMessaging.cs renamed

src/api/wix/WixToolset.Extensibility/Services/IParseHelper.cs renamed

src/api/wix/WixToolset.Extensibility/Services/IPathResolver.cs renamed

src/api/wix/WixToolset.Extensibility/Services/IPreprocessHelper.cs renamed

src/api/wix/WixToolset.Extensibility/Services/IVariableResolution.cs renamed

src/api/wix/WixToolset.Extensibility/Services/IVariableResolver.cs renamed

src/api/wix/WixToolset.Extensibility/Services/IWindowsInstallerBackendHelper.cs renamed

src/api/wix/WixToolset.Extensibility/Services/IWixBranding.cs renamed

src/api/wix/WixToolset.Extensibility/Services/IWixtoolsetCoreServiceProvider.cs renamed

src/api/wix/WixToolset.Extensibility/Services/ServiceProviderExtensions.cs renamed

src/api/wix/WixToolset.Extensibility/WixToolset.Extensibility.csproj renamed

src/api/wix/WixToolset.Extensibility/WixToolset.Extensibility.v3.ncrunchproject renamed

src/api/wix/appveyor-Extensibility.cmd renamed

src/api/wix/appveyor-Extensibility.yml renamed

src/api/wix/nuget-Extensibility.config renamed

src/version.json renamed