frontend complete migration from parcel to vite for much better production builds

frontend/misc/Loading.vue

@@ -0,0 +1,13 @@
+<script setup lang="ts">
+import {VContainer, VRow, VCol, VProgressCircular} from "vuetify/lib/components/index.mjs";
+</script>
+
+<template>
+  <v-container>
+    <v-row justify="center" style="height: 100%">
+      <v-col align-self="center">
+        <v-progress-circular indeterminate style="display: block; margin: 0 auto;"/>
+      </v-col>
+    </v-row>
+  </v-container>
+</template>