feat: initial Regnum project structure (Vue3 + Phaser3 + Socket.io)

client/src/App.vue

@@ -0,0 +1,14 @@
+<template>
+  <router-view />
+</template>
+
+<script setup>
+</script>
+
+<style>
+body {
+  background: #1a0a00;
+  color: #f5e6c8;
+  font-family: 'Georgia', serif;
+}
+</style>