Add languages api route

types/Dojo/ApiRoute.ts

@@ -4,6 +4,7 @@ enum ApiRoute {
     TEST_SESSION                 = '/test_session',
     GITLAB_CHECK_TEMPLATE_ACCESS = '/gitlab/project/{{id}}/checkTemplateAccess',
     SONAR                        = '/sonar',
+    LANGUAGES                    = '/assignments/languages',
     ASSIGNMENT_GET               = '/assignments/{{nameOrUrl}}',
     ASSIGNMENT_CREATE            = '/assignments',
     ASSIGNMENT_PUBLISH           = '/assignments/{{nameOrUrl}}/publish',