feat: status teacher invite

common/src/interfaces/teacher-invitation.ts

@@ -1,13 +1,16 @@
 import { UserDTO } from './user';
+import {ClassStatus} from "../util/class-join-request";
 
 export interface TeacherInvitationDTO {
     sender: string | UserDTO;
     receiver: string | UserDTO;
     classId: string;
+    status: ClassStatus;
 }
 
 export interface TeacherInvitationData {
     sender: string;
     receiver: string;
     class: string;
+    accepted?: boolean;
 }