feat: add UI for settings and app configuration (#90)

Add settings and app configuration UI for web app and self service
applications.

src/app/settings/settings-routing.module.ts

@@ -0,0 +1,22 @@
+import { NgModule } from '@angular/core';
+import { Routes, RouterModule } from '@angular/router';
+
+import { Route, extract } from '../core';
+import { SettingsComponent } from './settings.component';
+
+const routes: Routes = [
+  Route.withShell([
+    {
+      path: 'settings',
+      component: SettingsComponent,
+      data: { title: extract('Settings'), breadcrumb: 'Settings' }
+    }
+  ])
+];
+
+@NgModule({
+  imports: [RouterModule.forChild(routes)],
+  exports: [RouterModule],
+  providers: []
+})
+export class SettingsRoutingModule { }