Shady nagy/remove newton soft (#436)

* replace NewtonSoft with System.Text.Json

* not use auth for brande and types and use GetFromJsonAsync

* fix

* fix

* Auth HttpGet more simple.

* Put, Delete and Post  more simple.

* Fixed Edit for remove image and keep image and change other fields.
Added description required in Blazor Admin.

* Removed using not used

* Refactor AuthService and introduce HttpService. add validation for price.

* return null in HttpService if not success.

* Limt Price to 1000 mximum

* DI for Blazor Services

* one blazor service.

* fix

src/Web/Startup.cs

@@ -19,6 +19,7 @@ using System.IO;
 using System.Linq;
 using System.Net.Http;
 using System.Net.Mime;
+using BlazorAdmin;
 using BlazorAdmin.Services;
 using Blazored.LocalStorage;
 using Microsoft.AspNetCore.Authentication.Cookies;
@@ -149,6 +150,7 @@ namespace Microsoft.eShopWeb.Web
             services.AddBlazoredLocalStorage();
             services.AddServerSideBlazor();
             services.AddScoped<AuthService>();
+            services.AddBlazorServices();
 
             _services = services; // used to debug registered services
         }