Add Blazor WebAssembly Admin Page (#426)

* Added Blazor Client
Configured PublicAPI CORS to allow traffic from client

* Make admin page home page; remove extra pages
Add CatalogType list endpoint

* Wired up Types and Brands in the API and the admin list page

* Adding a custom HttpClient to talk securely to API

* Ardalis/blazor (#419)

* Login added

* AuthService will handel http request secure and not secure.

* Logout added

* CatalogBrandService in it is own service

* Get token from localstorage when refresh.

* used GetAsync

* Fixed Login and Logout switch.

* CatalogItemService added

* CatalogTypeService added & Auth for CatalogType.
using not used removed.

* Made BlazorComponent and BlazorLayoutComponent for refresh.
Index now small enough to be in one file.

* Removed the service from program main and use lazy singleton.

* used OnInitialized

* Refactoring and detecting login status in login.razor

* Refactoring login to redirect if user is already logged in

* Blazor login with MVC (#420)

* Blazor login with MVC

* return back the PasswordSignInAsync in Login page

* CRUD added (#422)

* CRUD added

* Unit Test changed to meet new redirect /admin

* CreateCatalogItemRequest added.

* Action caption added.

* Validation added for name and price.

* Updated port of api
Redirect to returnUrl from login

* Add username to /admin; link to my profile

* Working on authorization of /admin

* Working on custom auth locking down /admin page

* Microsoft authorize working.Login.razor removed.Login from SignInMana… (#425)

* Microsoft authorize working.Login.razor removed.Login from SignInManager and create token from it.unit test fixed.

* GetTokenFromController function used in CustomAuthStateProvider

* Cleaned up button styles
Refactored to use codebehind for List component
Updated Not Authorized view

Co-authored-by: Shady Nagy <shadynagi@gmail.com>

src/BlazorAdmin/App.razor

@@ -0,0 +1,30 @@
+<CascadingAuthenticationState>
+    <Router AppAssembly="@typeof(Program).Assembly">
+        <Found Context="routeData">
+            <AuthorizeRouteView RouteData="@routeData"
+                                DefaultLayout="@typeof(MainLayout)">
+                <NotAuthorized>
+                    @if (!context.User.Identity.IsAuthenticated)
+                    {
+                        <RedirectToLogin />
+                    }
+                    else
+                    {
+                        <h2>Not Authorized</h2>
+                        <p>
+                            You are not authorized to access
+                            this resource.
+
+                            <a href="/">Return to eShop</a>
+                        </p>
+                    }
+                </NotAuthorized>
+            </AuthorizeRouteView>
+        </Found>
+        <NotFound>
+            <LayoutView Layout="@typeof(MainLayout)">
+                <p>Sorry, there's nothing at this address.</p>
+            </LayoutView>
+        </NotFound>
+    </Router>
+</CascadingAuthenticationState>