feat: implement authentication with JWT and user management

frontend/src/app/feature/landing/landing.component.html

@@ -10,9 +10,14 @@
         <div class="welcome-bonus">200% bis zu 500€</div>
         <p class="bonus-description">+ 200 Freispiele</p>
 
-        <button class="w-full sm:w-auto button-primary px-6 sm:px-8 py-3 shadow-lg">
-          Bonus Sichern
-        </button>
+        <div class="flex justify-center space-x-4 mt-6">
+          <a routerLink="/register" class="w-full sm:w-auto button-primary px-6 sm:px-8 py-3 shadow-lg">
+            Konto erstellen
+          </a>
+          <a routerLink="/login" class="w-full sm:w-auto bg-slate-700 text-white hover:bg-slate-600 px-6 sm:px-8 py-3 shadow-lg rounded">
+            Anmelden
+          </a>
+        </div>
       </div>
 
       <div class="relative mb-16">