feat: add navigator service

src/services/navigation.service.ts

@@ -0,0 +1,18 @@
+import {EventEmitter, Injectable} from '@angular/core';
+import {BehaviorSubject, Observable} from "rxjs";
+
+@Injectable({
+  providedIn: 'root'
+})
+export class NavigationService {
+  private nextButtonState = new BehaviorSubject<boolean>(false);
+
+  nextButtonState$ = this.nextButtonState.asObservable();
+  nextButtonAction!: () => Observable<boolean>;
+
+  skipNavigation: EventEmitter<() => Observable<boolean>> = new EventEmitter();
+
+  setNextButtonState(state: boolean) {
+    this.nextButtonState.next(state);
+  }
+}