add: design, icons, calculation

Implemented new design for PriceCards, added some icons for visuals, added calculation per price card

app/pages/index.vue

@@ -1,6 +1,13 @@
 <template>
-  <PpPriceCard v-for="num in cards" :uid="num" />
-  <button @click="addCard">ADD</button>
+  <section class="content flex-col">
+    <div class="pc-wrapper flex-col">
+      <PpPriceCard v-for="num in cards" :uid="num" />
+    </div>
+    <PpButton class="cta" @click="addCard">
+      <Icon name="uil:plus" mode="svg" />
+      Vergleich hinzufügen
+    </PpButton>
+  </section>
 </template>
 
 <script setup lang="ts">