feat: answer routes en put question

common/src/interfaces/answer.ts

@@ -1,14 +1,19 @@
-import { UserDTO } from './user';
 import { QuestionDTO, QuestionId } from './question';
+import {TeacherDTO} from "./teacher";
 
 export interface AnswerDTO {
-    author: UserDTO;
+    author: TeacherDTO;
     toQuestion: QuestionDTO;
     sequenceNumber: number;
     timestamp: string;
     content: string;
 }
 
+export interface AnswerData {
+    author: string;
+    content: string;
+}
+
 export interface AnswerId {
     author: string;
     toQuestion: QuestionId;

common/src/interfaces/question.ts

@@ -4,8 +4,13 @@ import { StudentDTO } from './student';
 export interface QuestionDTO {
     learningObjectIdentifier: LearningObjectIdentifierDTO;
     sequenceNumber?: number;
-    author: string;
-    timestamp?: string;
+    author: StudentDTO;
+    timestamp: string;
+    content: string;
+}
+
+export interface QuestionData {
+    author?: string;
     content: string;
 }