feat: add navigation component (#590)

Fixes: #256

src/app/navigation/office-navigation/office-navigation.component.spec.ts

@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { OfficeNavigationComponent } from './office-navigation.component';
+
+describe('OfficeNavigationComponent', () => {
+  let component: OfficeNavigationComponent;
+  let fixture: ComponentFixture<OfficeNavigationComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ OfficeNavigationComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(OfficeNavigationComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});