Ajout du modèle Car et du composant permettant de l'afficher.

src/app/core/rest-services/car.rest-service.ts

@@ -0,0 +1,18 @@
+import { Injectable } from '@angular/core';
+import {HttpClient} from "@angular/common/http";
+import {Car} from "../model/car";
+import {toPromise} from "../utils/promises.utils";
+
+@Injectable({
+  providedIn: 'root'
+})
+export class CarRestService {
+
+  constructor(
+      private http: HttpClient
+  ) { }
+
+  findById(carId: string): Promise<Car> {
+    return toPromise(this.http.get<Car>(`/cars/${carId}`));
+  }
+}