feat: currency selection support (#72)

* initial UI for currency selection

* add task to purge invitation tokens

* group API contracts

* fix type import

* use auth middleware

* add currency setting support (UI)

* use group settings for format currency

* fix casing

frontend/components/global/Currency.vue

@@ -0,0 +1,22 @@
+<template>
+  {{ value }}
+</template>
+
+<script setup lang="ts">
+  const props = defineProps({
+    amount: {
+      type: String,
+      required: true,
+    },
+  });
+
+  const fmt = await useFormatCurrency();
+
+  const value = computed(() => {
+    if (!props.amount || props.amount === "0") {
+      return "";
+    }
+
+    return fmt(props.amount);
+  });
+</script>