add zero.Web project (helpers for ASP.NET Core frontend)

zero.Web/ZeroFallbackController.cs

@@ -0,0 +1,13 @@
+using Microsoft.AspNetCore.Mvc;
+using Newtonsoft.Json;
+using zero.Routing;
+
+namespace zero.Web;
+
+public class ZeroFallbackController : ZeroController<PageRoute>
+{
+  public IActionResult Index()
+  {
+    return Json(new { Application, Route }, new JsonSerializerSettings() { TypeNameHandling = TypeNameHandling.None });
+  }
+}