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/PublicApi/CatalogItemEndpoints/Update.UpdateCatalogItemRequest.cs

@@ -15,6 +15,7 @@ namespace Microsoft.eShopWeb.PublicApi.CatalogItemEndpoints
         [Required]
         public string Name { get; set; }
         public string PictureBase64 { get; set; }
+        public string PictureUri { get; set; }
         public string PictureName { get; set; }
         [Range(0.01, 10000)]
         public decimal Price { get; set; }

src/PublicApi/CatalogItemEndpoints/Update.cs

@@ -42,7 +42,7 @@ namespace Microsoft.eShopWeb.PublicApi.CatalogItemEndpoints
             existingItem.UpdateBrand(request.CatalogBrandId);
             existingItem.UpdateType(request.CatalogTypeId);
 
-            if (string.IsNullOrEmpty(request.PictureBase64))
+            if (string.IsNullOrEmpty(request.PictureBase64) && string.IsNullOrEmpty(request.PictureUri))
             {
                 existingItem.UpdatePictureUri(string.Empty);
             }