add first draft of vue app

frontend/src/views/BoardUsersView.vue

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+<script setup lang="ts">
+import ItemList from '@/components/ItemList.vue'
+import ItemListElement from '@/components/ItemListElement.vue'
+</script>
+
+<template>
+  <ItemList title="Mitglieder">
+    <ItemListElement name="Elias" subtitle="7.07€" subtitle-class="text-green-700" />
+    <ItemListElement name="Max" subtitle="-16.27€" subtitle-class="text-red-700" />
+    <ItemListElement name="Daniel" subtitle="9.20€" subtitle-class="text-green-700" />
+  </ItemList>
+</template>

frontend/src/views/BoardView.vue

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+<script setup lang="ts">
+import BoardMenu from '@/components/BoardMenu.vue'
+</script>
+
+<template>
+  <div class="flex flex-col justify-center gap-2 p-4">
+    <div class="flex justify-center">
+      <BoardMenu />
+    </div>
+    <div class="flex justify-center">
+      <RouterView />
+    </div>
+  </div>
+</template>

frontend/src/views/HomeView.vue

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+<script setup lang="ts">
+import CreateNewList from '../components/CreateNewList.vue'
+</script>
+
+<template>
+  <main class="grid h-full place-content-center">
+    <CreateNewList></CreateNewList>
+  </main>
+</template>