Refactor preview routes into separate module

frontend/src/app/previews.module.ts

@@ -0,0 +1,26 @@
+import { NgModule } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { SharedModule } from './shared/shared.module';
+import { RouterModule } from '@angular/router';
+import { GraphsModule } from './graphs/graphs.module';
+import { PreviewsRoutingModule } from './previews.routing.module';
+import { TransactionPreviewComponent } from './components/transaction/transaction-preview.component';
+import { BlockPreviewComponent } from './components/block/block-preview.component';
+import { AddressPreviewComponent } from './components/address/address-preview.component';
+import { MasterPagePreviewComponent } from './components/master-page-preview/master-page-preview.component';
+@NgModule({
+  declarations: [
+    TransactionPreviewComponent,
+    BlockPreviewComponent,
+    AddressPreviewComponent,
+    MasterPagePreviewComponent,
+  ],
+  imports: [
+    CommonModule,
+    SharedModule,
+    RouterModule,
+    GraphsModule,
+    PreviewsRoutingModule,
+  ],
+})
+export class PreviewsModule { }