feat: add homepage components and API for settings and spielplan options

- Introduced new Vue components for homepage teasers: HomeLinksTeaser, HomeSpielplanTeamWidget, HomeTrainingTeaser, and HomeVereinsmeisterschaftenTeaser.
- Created XML layout for tablet app window dump.
- Implemented API endpoints for fetching and updating homepage settings.
- Added API for retrieving spielplan options, including team extraction logic.

components/HomeLinksTeaser.vue

@@ -0,0 +1,20 @@
+<template>
+  <section class="py-16 bg-white">
+    <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
+      <div class="bg-gray-50 rounded-xl shadow-sm p-8 md:p-10 border border-gray-200">
+        <h2 class="text-2xl md:text-3xl font-display font-bold text-gray-900 mb-3">
+          Nützliche Links
+        </h2>
+        <p class="text-gray-600 mb-6 max-w-3xl">
+          Direkter Zugang zu Verbänden, Ergebnisdiensten und weiteren hilfreichen Portalen.
+        </p>
+        <NuxtLink
+          to="/links"
+          class="inline-flex items-center px-6 py-3 rounded-lg border border-primary-600 text-primary-700 hover:bg-primary-50 font-semibold transition-colors"
+        >
+          Links öffnen
+        </NuxtLink>
+      </div>
+    </div>
+  </section>
+</template>