refactor: apply default vs transform to xproj

refactor(spa-services): clean code

refactor(node-services): clean code, extract classes nto separate files

refactor(angular-services): prime cache cleanup

src/Microsoft.AspNetCore.SpaServices/Prerendering/JavaScriptModuleExport.cs

@@ -0,0 +1,14 @@
+namespace Microsoft.AspNetCore.SpaServices.Prerendering
+{
+    public class JavaScriptModuleExport
+    {
+        public JavaScriptModuleExport(string moduleName)
+        {
+            this.ModuleName = moduleName;
+        }
+
+        public string ModuleName { get; private set; }
+        public string ExportName { get; set; }
+        public string WebpackConfig { get; set; }
+    }
+}