Implement creating qualifications (#17)

Co-authored-by: Phan Huy Tran <p.tran@neusta.de>
Reviewed-on: #17
Reviewed-by: Constantin Simonis <constantin@simonis.lol>

src/app/services/qualification.service.ts

@@ -16,4 +16,8 @@ export default class QualificationService {
   public getAll(): Observable<Qualification[]> {
     return this.http.get<Qualification[]>(`${QualificationService.BASE_URL}/qualifications`)
   }
+
+  public create(data: any) {
+    return this.http.post(`${QualificationService.BASE_URL}/qualifications`, data)
+  }
 }