feat: add navigation component (#590)

Fixes: #256

src/app/navigation/offices.resolver.ts

@@ -0,0 +1,30 @@
+/** Angular Imports */
+import { Injectable } from '@angular/core';
+import { Resolve } from '@angular/router';
+
+/** rxjs Imports */
+import { Observable } from 'rxjs';
+
+/** Custom Services */
+import { NavigationService } from './navigation.service';
+
+/**
+ * Offices data resolver.
+ */
+@Injectable()
+export class OfficesResolver implements Resolve<Object> {
+
+  /**
+   * @param {NavigationService} navigationService Navigation service.
+   */
+  constructor(private navigationService: NavigationService) {}
+
+  /**
+   * Returns the Offices data.
+   * @returns {Observable<any>}
+   */
+  resolve(): Observable<any> {
+    return this.navigationService.getOffices();
+  }
+
+}