add vue frontend scaffold

Add the standalone Vue, Vite, and TypeScript application with Vue Router and Pinia. Include npm dependency locking and the generated lint, formatting, and editor configuration.

frontend/website/src/App.vue

@@ -0,0 +1,11 @@
+<script setup lang="ts"></script>
+
+<template>
+  <h1>You did it!</h1>
+  <p>
+    Visit <a href="https://vuejs.org/" target="_blank" rel="noopener">vuejs.org</a> to read the
+    documentation
+  </p>
+</template>
+
+<style scoped></style>