update: http error handling page

docs/en/framework/ui/angular/http-error-handling.md

@@ -5,25 +5,25 @@
 ABP offers a configurations for errors handling like below
 
 ```ts
-import { ThemeSharedModule } from '@abp/ng.theme.shared';
+//app.config.ts
-import { MyCustomRouteErrorComponent } from './my-custom-route.component';
+import { provideAbpThemeShared } from '@abp/ng.theme.shared';
+import { CustomErrorComponent } from './custom-error.component';
 
-@NgModule({
+export const appConfig: ApplicationConfig = {
-  imports: [
+  providers: [
-    ThemeSharedModule.forRoot({
+    provideAbpThemeShared(
-      httpErrorConfig: {
+      withHttpErrorConfig({
         skipHandledErrorCodes: [403],
         errorScreen: {
-          forWhichErrors: [404],
           component: CustomErrorComponent,
-          hideCloseIcon: false
+          forWhichErrors: [404],
-        }
+          hideCloseIcon: false,
-      }
+        },
-    }),
+      }),
-    ...
+    ),
   ],
-})
+};
-export class AppModule {}
+
 ```
 
 - `ErrorScreenErrorCodes` the error codes that you can pass to `skipHandledErrorCodes` and `forWhichErrors`.
@@ -67,22 +67,19 @@ export function handleHttpErrors(injector: Injector, httpError: HttpErrorRespons
   return of(httpError);
 }
 
-// app.module.ts
+// app.config.ts
 import { Error404Component } from './error404/error404.component';
 import { handleHttpErrors } from './http-error-handling';
 import { HTTP_ERROR_HANDLER, ... } from '@abp/ng.theme.shared';
 
-@NgModule({
+export const appConfig: ApplicationConfig = {
-  // ...
   providers: [
-    // ...
+    ...
-    { provide: HTTP_ERROR_HANDLER, useValue: handleHttpErrors }
+    { provide: HTTP_ERROR_HANDLER, useValue: handleHttpErrors },
+    ...
   ],
-  declarations: [
+};
-   //...
+
-   Error404Component],
-})
-export class AppModule {}
 ```
 
 In the example above:
@@ -199,18 +196,16 @@ export class MyCustomErrorHandlerService
 import { CUSTOM_ERROR_HANDLERS, ... } from '@abp/ng.theme.shared';
 import { MyCustomErrorHandlerService } from './custom-error-handler.service';
 
-@NgModule({
+export const appConfig: ApplicationConfig = {
-  // ...
   providers: [
-    // ...
+    //...
     {
       provide: CUSTOM_ERROR_HANDLERS,
       useExisting: MyCustomErrorHandlerService,
       multi: true,
     }
-  ]
+  ],
-})
+};
-export class AppModule {}
 ```
 
 In the example above: