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/HomeTrainingTeaser.vue

@@ -0,0 +1,20 @@
+<template>
+  <section class="py-16 bg-gray-50">
+    <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
+      <div class="bg-white rounded-xl shadow-lg p-8 md:p-10 border border-gray-100">
+        <h2 class="text-2xl md:text-3xl font-display font-bold text-gray-900 mb-3">
+          Training & Einstieg
+        </h2>
+        <p class="text-gray-600 mb-6 max-w-3xl">
+          Alle Infos zu Trainingszeiten, Trainern und unserem Anfängerangebot auf einen Blick.
+        </p>
+        <NuxtLink
+          to="/training"
+          class="inline-flex items-center px-6 py-3 rounded-lg bg-primary-600 hover:bg-primary-700 text-white font-semibold transition-colors"
+        >
+          Zum Training
+        </NuxtLink>
+      </div>
+    </div>
+  </section>
+</template>