fix: JWT kid/jku lessons (#1949)

* refactor: rewrite hints

Use active voice and fix grammar issues.

* fix: use Thymeleaf `th:action`

* fix: JWT kid/jku lessons

Split the JavaScript into two files they pointed to the same URL

The JWTs are now valid, they parse successfully.

The paths now include `/kid` and `/jku` to make sure the hints match accordingly in the UI. Otherwise `/delete` would pick up both hints from both assignments as the paths overlap.

Closes: #1715

* fix: update to latest pre-commit version

* fix: increase timeouts for server to start during integration tests

src/main/resources/lessons/jwt/js/jwt-jku.js

@@ -1,7 +1,7 @@
 function follow(user) {
     $.ajax({
         type: 'POST',
-        url: 'JWT/final/follow/' + user
+        url: 'JWT/kid/follow/' + user
     }).then(function (result) {
         $("#toast").append(result);
     })

src/main/resources/lessons/jwt/js/jwt-kid.js

@@ -0,0 +1,8 @@
+function startFollowing(user) {
+    $.ajax({
+        type: 'POST',
+        url: 'JWT/kid/follow/' + user
+    }).then(function (result) {
+        $("#toast").append(result);
+    })
+}